ID

VAR-200707-0675

CVE

CVE-2008-1447

TITLE

Multiple DNS implementations vulnerable to cache poisoning

DESCRIPTION

The DNS protocol, as implemented in (1) BIND 8 and 9 before 9.5.0-P1, 9.4.2-P1, and 9.3.5-P1; (2) Microsoft DNS in Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP1 and SP2; and other implementations allow remote attackers to spoof DNS traffic via a birthday attack that uses in-bailiwick referrals to conduct cache poisoning against recursive resolvers, related to insufficient randomness of DNS transaction IDs and source ports, aka "DNS Insufficient Socket Entropy Vulnerability" or "the Kaminsky bug.". plural DNS There is a vulnerability in the implementation that makes cache poisoning attacks easier. Recent research has found a more efficient method of cash poisoning than previously known. DNS As a cache server, PC Please note that there is a possibility of attack. Cash poisoning attack forged response This is done by sending a packet. query The source port of the packet query By changing the value randomly every time, the probability of a successful cache poisoning attack can be reduced.By cash poisoning attack DNS Fake cache server DNS Information can be cached and DNS Nodes using the cache server may be directed to fake sites. Various implementations of DNS services may allow multiple simultaneous queries for the same resource record, allowing an attacker to apply probabilistic techniques to improve their odds of successful DNS spoofing. RESOLUTION The resolution is to discontinue the use of BIND/iX and migrate DNS services to another platform. =========================================================== Ubuntu Security Notice USN-627-1 July 22, 2008 dnsmasq vulnerability CVE-2008-1447 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.04 LTS This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: dnsmasq-base 2.41-2ubuntu2.1 After a standard system upgrade you need to restart Dnsmasq to effect the necessary changes. Details follow: Dan Kaminsky discovered weaknesses in the DNS protocol as implemented by Dnsmasq. Updated packages for Ubuntu 8.04 LTS: Source archives: http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq_2.41-2ubuntu2.1.diff.gz Size/MD5: 22023 89c0f060733a11e414ef1fa634b17149 http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq_2.41-2ubuntu2.1.dsc Size/MD5: 698 e44ebdb66be7abcaba3f1558b9379abb http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq_2.41.orig.tar.gz Size/MD5: 357997 8d0acd6656299a800c4d1be5a1193e39 Architecture independent packages: http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq_2.41-2ubuntu2.1_all.deb Size/MD5: 11962 fbe42757babf0522e92a48438cdf7d0b amd64 architecture (Athlon64, Opteron, EM64T Xeon): http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq-base_2.41-2ubuntu2.1_amd64.deb Size/MD5: 210032 015334862975edd0c6157624b9b4cd6b i386 architecture (x86 compatible Intel/AMD): http://security.ubuntu.com/ubuntu/pool/main/d/dnsmasq/dnsmasq-base_2.41-2ubuntu2.1_i386.deb Size/MD5: 202466 87bebd172bae955ef2ae8f2de323a737 lpia architecture (Low Power Intel Architecture): http://ports.ubuntu.com/pool/main/d/dnsmasq/dnsmasq-base_2.41-2ubuntu2.1_lpia.deb Size/MD5: 202996 8938160f148e63de63cad64e2721c6d6 powerpc architecture (Apple Macintosh G3/G4/G5): http://ports.ubuntu.com/pool/main/d/dnsmasq/dnsmasq-base_2.41-2ubuntu2.1_powerpc.deb Size/MD5: 210320 865aa2d674736978b2b00a8623267fc4 sparc architecture (Sun SPARC/UltraSPARC): http://ports.ubuntu.com/pool/main/d/dnsmasq/dnsmasq-base_2.41-2ubuntu2.1_sparc.deb Size/MD5: 204034 211f90a72d775d1987b6c3179786546f . Resolution ========== All BIND users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/bind-9.4.2_p1" Note: In order to utilize the query port randomization to mitigate the weakness, you need to make sure that your network setup allows the DNS server to use random source ports for query and that you have not set a fixed query port via the "query-source port" directive in the BIND configuration. Corrected: 2008-07-12 10:07:33 UTC (RELENG_6, 6.3-STABLE) 2008-07-13 18:42:38 UTC (RELENG_6_3, 6.3-RELEASE-p3) 2008-07-13 18:42:38 UTC (RELENG_7, 7.0-STABLE) 2008-07-13 18:42:38 UTC (RELENG_7_0, 7.0-RELEASE-p3) CVE Name: CVE-2008-1447 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. Background BIND 9 is an implementation of the Domain Name System (DNS) protocols. The named(8) daemon is an Internet Domain Name Server. DNS requests contain a query id which is used to match a DNS request with the response and to make it harder for anybody but the DNS server which received the request to send a valid response. This allows the attacker to influence or control the results of DNS queries being returned to users from target systems. To limit the machines able to perform recursive queries, add an ACL in named.conf and limit recursion like the following: acl example-acl { 192.0.2.0/24; }; options { recursion yes; allow-recursion { example-acl; }; }; V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 6-STABLE or 7-STABLE, or to the RELENG_7_0 or RELENG_6_3 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 6.3 and 7.0 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 6.3] # fetch http://security.FreeBSD.org/patches/SA-08:06/bind63.patch # fetch http://security.FreeBSD.org/patches/SA-08:06/bind63.patch.asc [FreeBSD 7.0] # fetch http://security.FreeBSD.org/patches/SA-08:06/bind7.patch # fetch http://security.FreeBSD.org/patches/SA-08:06/bind7.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/lib/bind # make obj && make depend && make && make install # cd /usr/src/usr.sbin/named # make obj && make depend && make && make install NOTE WELL: This update causes BIND to choose a new, random UDP port for each new query; this may cause problems for some network configurations, particularly if firewall(s) block incoming UDP packets on particular ports. The avoid-v4-udp-ports and avoid-v6-udp-ports options should be used to avoid selecting random port numbers within a blocked range. Consequently it is strongly recommended that these options not be used to specify fixed port numbers. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_6 src/contrib/bind9/bin/named/client.c 1.1.1.2.2.5 src/contrib/bind9/bin/named/server.c 1.1.1.2.2.4 src/contrib/bind9/lib/dns/api 1.1.1.2.2.5 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.1.4.4 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.1.4.3 src/contrib/bind9/lib/dns/resolver.c 1.1.1.2.2.8 RELENG_6_3 src/UPDATING 1.416.2.37.2.8 src/sys/conf/newvers.sh 1.69.2.15.2.7 src/contrib/bind9/bin/named/client.c 1.1.1.2.2.3.2.1 src/contrib/bind9/bin/named/server.c 1.1.1.2.2.2.2.1 src/contrib/bind9/lib/dns/api 1.1.1.2.2.3.2.1 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.1.4.2.2.1 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.1.4.1.2.1 src/contrib/bind9/lib/dns/resolver.c 1.1.1.2.2.6.2.1 RELENG_7 src/contrib/bind9/bin/named/client.c 1.1.1.6.2.2 src/contrib/bind9/bin/named/server.c 1.1.1.6.2.2 src/contrib/bind9/lib/dns/api 1.1.1.6.2.2 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.4.2.2 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.3.2.2 src/contrib/bind9/lib/dns/resolver.c 1.1.1.9.2.2 RELENG_7_0 src/UPDATING 1.507.2.3.2.7 src/sys/conf/newvers.sh 1.72.2.5.2.7 src/contrib/bind9/bin/named/client.c 1.1.1.6.2.1.2.1 src/contrib/bind9/bin/named/server.c 1.1.1.6.2.1.2.1 src/contrib/bind9/lib/dns/api 1.1.1.6.2.1.2.1 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.4.2.1.2.1 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.3.2.1.2.1 src/contrib/bind9/lib/dns/resolver.c 1.1.1.9.2.1.2.1 - ------------------------------------------------------------------------- VII. This change increases the size of the space from which an attacker has to guess values in a backwards-compatible fashion and makes successful attacks significantly more difficult. Note that this security update changes BIND network behavior in a fundamental way, and the following steps are recommended to ensure a smooth upgrade. Make sure that your network configuration is compatible with source port randomization. If you guard your resolver with a stateless packet filter, you may need to make sure that no non-DNS services listen on on the 1024--65535 UDP port range and open it at the packet filter. For instance, packet filters based on etch's Linux 2.6.18 kernel only support stateless filtering of IPv6 packets, and are therefore pose this additional difficulty. (If you use IPv4 with iptables and ESTABLISHED rules, networking changes are likely not required.) 2. Verify that the named process has been restarted and answers recursive queries. (If all queries result in timeouts, this indicates that networking changes are necessary; see the first step.) 3. Verify that source port randomization is active. Check that the /var/log/daemon.log file does not contain messages of the following form named[6106]: /etc/bind/named.conf.options:28: using specific query-source port suppresses port randomization and can be insecure. right after the "listening on IPv6 interface" and "listening on IPv4 interface" messages logged by BIND upon startup. For additional certainty, use tcpdump or some other network monitoring tool to check for varying UDP source ports. If you cannot activate source port randomization, consider configuring BIND 9 to forward queries to a resolver which can, possibly over a VPN such as OpenVPN to create the necessary trusted network link. (Use BIND's forward-only mode in this case.) Other caching resolvers distributed by Debian (PowerDNS, MaraDNS, Unbound) already employ source port randomization, and no updated packages are needed. BIND 9.5 up to and including version 1:9.5.0.dfsg-4 only implements a weak form of source port randomization and needs to be updated as well. For information on BIND 8, see DSA-1604-1, and for the status of the libc stub resolver, see DSA-1605-1. The updated bind9 packages contain changes originally scheduled for the next stable point release, including the changed IP address of L.ROOT-SERVERS.NET (Debian bug #449148). For the stable distribution (etch), this problem has been fixed in version 9.3.4-2etch3. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your bind9 package. Upgrade instructions - -------------------- wget url will fetch the file for you dpkg -i file.deb will install the referenced file. If you are using the apt-get package manager, use the line for sources.list as given below: apt-get update will update the internal database apt-get upgrade will install corrected packages You may use an automated update by adding the resources from the footer to the proper configuration. Debian GNU/Linux 4.0 alias etch - ------------------------------- Debian (stable) - --------------- Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc. 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a59dbf1edb5518b09b2993049922c01a These files will probably be moved into the stable distribution on its next update. In IP NAT filtering in Sun Solaris 10 and OpenSolaris series products, when a DNS server runs NAT, it incorrectly changes the original address of the data packet. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200812-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Ruby: Multiple vulnerabilities Date: December 16, 2008 Bugs: #225465, #236060 ID: 200812-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been discovered in Ruby that allow for attacks including arbitrary code execution and Denial of Service. Background ========== Ruby is an interpreted object-oriented programming language. The elaborate standard library includes an HTTP server ("WEBRick") and a class for XML parsing ("REXML"). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-lang/ruby < 1.8.6_p287-r1 >= 1.8.6_p287-r1 Description =========== Multiple vulnerabilities have been discovered in the Ruby interpreter and its standard libraries. Drew Yao of Apple Product Security discovered the following flaws: * Arbitrary code execution or Denial of Service (memory corruption) in the rb_str_buf_append() function (CVE-2008-2662). * Arbitrary code execution or Denial of Service (memory corruption) in the rb_ary_stor() function (CVE-2008-2663). * Memory corruption via alloca in the rb_str_format() function (CVE-2008-2664). * Memory corruption ("REALLOC_N") in the rb_ary_splice() and rb_ary_replace() functions (CVE-2008-2725). * Memory corruption ("beg + rlen") in the rb_ary_splice() and rb_ary_replace() functions (CVE-2008-2726). Furthermore, several other vulnerabilities have been reported: * Tanaka Akira reported an issue with resolv.rb that enables attackers to spoof DNS responses (CVE-2008-1447). * Akira Tagoh of RedHat discovered a Denial of Service (crash) issue in the rb_ary_fill() function in array.c (CVE-2008-2376). * Several safe level bypass vulnerabilities were discovered and reported by Keita Yamaguchi (CVE-2008-3655). * Christian Neukirchen is credited for discovering a Denial of Service (CPU consumption) attack in the WEBRick HTTP server (CVE-2008-3656). * A fault in the dl module allowed the circumvention of taintness checks which could possibly lead to insecure code execution was reported by "sheepman" (CVE-2008-3657). * Luka Treiber and Mitja Kolsek (ACROS Security) disclosed a Denial of Service (CPU consumption) vulnerability in the REXML module when dealing with recursive entity expansion (CVE-2008-3790). Impact ====== These vulnerabilities allow remote attackers to execute arbitrary code, spoof DNS responses, bypass Ruby's built-in security and taintness checks, and cause a Denial of Service via crash or CPU exhaustion. Workaround ========== There is no known workaround at this time. Resolution ========== All Ruby users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.6_p287-r1" References ========== [ 1 ] CVE-2008-1447 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447 [ 2 ] CVE-2008-2376 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2376 [ 3 ] CVE-2008-2662 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2662 [ 4 ] CVE-2008-2663 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2663 [ 5 ] CVE-2008-2664 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2664 [ 6 ] CVE-2008-2725 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2725 [ 7 ] CVE-2008-2726 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2726 [ 8 ] CVE-2008-3655 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3655 [ 9 ] CVE-2008-3656 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3656 [ 10 ] CVE-2008-3657 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3657 [ 11 ] CVE-2008-3790 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3790 [ 12 ] CVE-2008-3905 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3905 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200812-17.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2008 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . HP-UX B.11.00. HP-UX B.11.00 may be affected by this vulnerability if the BINDv4 Domain Name Server (DNS) is configured to do both of the following: * support recursive requests and cache the results * respond to DNS requests made by untrusted systems To determine if an HP-UX system has an affected version, search the output of "swlist -a revision -l fileset" for one of the filesets listed below. AFFECTED VERSIONS HP-UX B.11.00 ============= InternetSrvcs.INETSVCS-RUN action: add "options no-recursion" to /etc/named.boot END AFFECTED VERSIONS RESOLUTION The potential vulnerability may be avoided by blocking access to the system from untrusted systems or by disabling DNS recursion. Note: This issue has been previously reported in HPSBGN01156 SSRT2400 rev.0 (7 August 2003). HPSBGN01156 did not have the Affected Versions for the HP-UX Security Patch Check. Background ========== Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP server. * Carlos Carvalho reported that dnsmasq in the 2.43 version does not properly handle clients sending inform or renewal queries for unknown DHCP leases, leading to a crash (CVE-2008-3350). Furthermore, an attacker could generate invalid DHCP traffic and cause a Denial of Service. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Alert System Technical Cyber Security Alert TA08-190B Multiple DNS implementations vulnerable to cache poisoning Original release date: July 08, 2008 Last revised: -- Source: US-CERT Systems Affected Systems implementing: * Caching DNS resolvers * DNS stub resolvers Affected systems include both client and server systems, and any other networked systems that include this functionality. Effective attack techniques against these vulnerabilities have been demonstrated. I. Examples of these vulnerabilities can be found in Vulnerability Note VU#800113. Tools and techniques have been developed that can reliably poison a domain of the attacker's choosing on most current implementations. As a result, the consensus of DNS software implementers is to implement source port randomization in their resolvers as a mitigation. US-CERT is tracking this issue as VU#800113. This reference number corresponds to CVE-2008-1447. II. Impact An attacker with the ability to conduct a successful cache poisoning attack can cause a nameserver's clients to contact the incorrect, and possibly malicious, hosts for particular services. Consequently, web traffic, email, and other important network data can be redirected to systems under the attacker's control. III. Solution Apply a patch from your vendor Patches have been released by a number of vendors to implement source port randomization in the nameserver. Please see the Systems Affected section of Vulnerability Note VU#800113 for additional details for specific vendors. As mentioned above, stub resolvers are also vulnerable to these attacks. Stub resolvers that will issue queries in response to attacker behavior, and may receive packets from an attacker, should be patched. System administrators should be alert for patches to client operating systems that implement port randomization in the stub resolver. Workarounds Restrict access Administrators, particularly those who are unable to apply a patch, can limit exposure to this vulnerability by restricting sources that can ask for recursion. Note that restricting access will still allow attackers with access to authorized hosts to exploit this vulnerability. Filter traffic at network perimeters Because the ability to spoof IP addresses is necessary to conduct these attacks, administrators should take care to filter spoofed addresses at the network perimeter. IETF Request for Comments (RFC) documents RFC 2827, RFC 3704, and RFC 3013 describe best current practices (BCPs) for implementing this defense. It is important to understand your network's configuration and service requirements before deciding what changes are appropriate. Run a local DNS cache In lieu of strong port randomization characteristics in a stub resolver, administrators can protect their systems by using local caching full-service resolvers, both on the client systems and on servers that are topologically close on the network to the client systems. This should be done in conjunction with the network segmentation and filtering strategies mentioned above. Disable recursion Disable recursion on any nameserver responding to DNS requests made by untrusted systems. Implement source port randomization Vendors that implement DNS software are encouraged to review IETF Internet Draft, "Measures for making DNS more resilient against forged answers," for additional information about implementing mitigations in their products. This document is a work in progress and may change prior to its publication as an RFC, if it is approved. IV. References * US-CERT Vulnerability Note VU#800113 - <http://www.kb.cert.org/vuls/id/800113> * US-CERT Vulnerability Note VU#484649 - <http://www.kb.cert.org/vuls/id/484649> * US-CERT Vulnerability Note VU#252735 - <http://www.kb.cert.org/vuls/id/252735> * US-CERT Vulnerability Note VU#927905 - <http://www.kb.cert.org/vuls/id/927905> * US-CERT Vulnerability Note VU#457875 - <http://www.kb.cert.org/vuls/id/457875> * Internet Draft: Measures for making DNS more resilient against forged answers - <http://tools.ietf.org/html/draft-ietf-dnsext-forgery-resilience> * RFC 3833 - <http://tools.ietf.org/html/rfc3833> * RFC 2827 - <http://tools.ietf.org/html/rfc2827> * RFC 3704 - <http://tools.ietf.org/html/rfc3704> * RFC 3013 - <http://tools.ietf.org/html/rfc3013> * Microsoft Security Bulletin MS08-037 - <http://www.microsoft.com/technet/security/bulletin/ms08-037.mspx> * Internet Systems Consortium BIND Vulnerabilities - <http://www.isc.org/sw/bind/bind-security.php> ____________________________________________________________________ US-CERT thanks Dan Kaminsky of IOActive and Paul Vixie of Internet Systems Consortium (ISC) for notifying us about this problem and for helping us to construct this advisory. ____________________________________________________________________ The most recent version of this document can be found at: <http://www.us-cert.gov/cas/techalerts/TA08-190B.html> ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. ____________________________________________________________________ Produced 2008 by US-CERT, a government organization. There are two ways to deal with this situation: 1. The documentation included with BIND 9 contains a migration guide. Configure the BIND 8 resolver to forward queries to a BIND 9 resolver. Provided that the network between both resolvers is trusted, this protects the BIND 8 resolver from cache poisoning attacks (to the same degree that the BIND 9 resolver is protected). This problem does not apply to BIND 8 when used exclusively as an authoritative DNS server. BIND 8 (that is, the bind package) will be removed from the etch distribution in a future point release. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c01506861 Version: 6 HPSBUX02351 SSRT080058 rev.6 - HP-UX Running BIND, Remote DNS Cache Poisoning NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2008-07-16 Last Updated: 2010-12-15 ----------------------------------------------------------------------------- Potential Security Impact: Remote DNS cache poisoning Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY A potential security vulnerability has been identified with HP-UX running BIND. References: CVE-2008-1447 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.11, B.11.23, B.11.31 running BIND v9.3.2 or BIND v9.2.0, HP-UX B.11.11 running BIND v8.1.2 BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2008-1447 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided the following software updates / patch to resolve the vulnerabilities for BIND v9.2.0 and BIND v9.3.2. Customers running BIND v8.1.2 on HP-UX B.11.11 should upgrade to BIND v9.2.0 or BIND v9.3.2 and apply the updates listed below. A new BIND v9.2.0 depot is available to address an issue encountered on HP-UX B.11.11. The new depot is available by contacting HP Support. The BIND v9.3.2 updates are available for download from: http://software.hp.com The patch PHNE_37865 is available from: http://itrc.hp.com HP-UX Release / Action B.11.11 running v8.1.2 / Upgrade to BIND v9.2.0 or BIND v9.3.2 and apply the updates listed below, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. HP-UX Release / BIND Depot name / Action B.11.11 running v9.2.0 / BIND920V15.depot / Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. HP-UX Release / Action B.11.23 running v9.2.0 / Install PHNE_37865 or subsequent; Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. HP-UX Release / Action B.11.11 running v9.3.2 / Install revision C.9.3.2.7.0 or subsequent; Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. B.11.23 running v9.3.2 / Install revision C.9.3.2.7.0 or subsequent; Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. B.11.31 running v9.3.2 / Install revision C.9.3.2.3.0 or subsequent; Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. Note: Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. Note: Firewall configurations may need to be adjusted to allow DNS queries from random source ports to pass. In addition, firewalls that forward DNS queries must not replace the random source ports. MANUAL ACTIONS: Yes - NonUpdate Remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. Check firewall settings. For B.11.11 running v8.1.2, upgrade to BIND v9.2.0 or BIND v9.3.2 and apply the updates For B.11.11 running v9.2.0 install BIND920v15.depot PRODUCT SPECIFIC INFORMATION HP-UX Software Assistant: HP-UX Software Assistant is an enhanced application that replaces HP-UX Security Patch Check. It analyzes all HP-issued Security Bulletins and lists recommended actions that may apply to a specific HP-UX system. It can also download patches and create a depot automatically. For more information see: https://www.hp.com/go/swa AFFECTED VERSIONS For BIND v8.1.2 HP-UX B.11.11 ============= InternetSrvcs.INETSVCS-RUN action: upgrade to BIND v9.2.0 or BIND v9.3.2 and apply the updates, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. For BIND v9.3.2 HP-UX B.11.11 ============= BindUpgrade.BIND-UPGRADE action: install revision C.9.3.2.7.0 or subsequent, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. URL: http://software.hp.com HP-UX B.11.23 ============= BindUpgrade.BIND-UPGRADE BindUpgrade.BIND2-UPGRADE action: install revision C.9.3.2.7.0 or subsequent, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. URL: http://software.hp.com HP-UX B.11.31 ============= NameService.BIND-AUX NameService.BIND-RUN action: install revision C.9.3.2.7.0 or subsequent, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. URL: http://software.hp.com For BIND v9.2.0 HP-UX B.11.11 ============= BINDv920.INETSVCS-BIND action: install revision B.11.11.01.015 or subsequent, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. URL Contact HP Support for information on where to download depot. HP-UX B.11.23 ============= InternetSrvcs.INETSVCS-INETD InternetSrvcs.INETSVCS-RUN InternetSrvcs.INETSVCS2-RUN action: install patch PHNE_37865 or subsequent, remove "query-source port" and "query-source-v6 port" options in /etc/named.conf. URL: http://itrc.hp.com END AFFECTED VERSIONS HISTORY Version:1 (rev.1) - 16 July 2008 Initial release Version:2 (rev.2) - 19 July 2008 Added BIND v9.2.0 depot information Version:3 (rev.3) - 06 August 2008 Updated patch location, revised BIND v9.2.0 depot information, added BIND v8.1.2 Version:4 (rev.4) - 08 August 2008 Updated manual actions to include named.conf and firewall configuration setings Version:5 (rev.5) - 12 October 2010 Updated version for BIND v9.2.0 depot for B.11.11 Version:6 (rev.6) - 15 December 2010 Reformat v9.2.0 recommendation for clarity. Third Party Security Patches: Third party security patches that are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy. Support: For further information, contact normal HP Services support channel. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. To get the security-alert PGP key, please send an e-mail message as follows: To: security-alert@hp.com Subject: get key Subscribe: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC On the web page: ITRC security bulletins and patch sign-up Under Step1: your ITRC security bulletins and patches -check ALL categories for which alerts are required and continue. Under Step2: your ITRC operating systems -verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page: Subscriber's choice for Business: sign-in. On the web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. To review previously published Security Bulletins visit: http://www.itrc.hp.com/service/cki/secBullArchive.do * The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number in the title: GN = HP General SW MA = HP Management Agents MI = Misc. 3rd Party SW MP = HP MPE/iX NS = HP NonStop Servers OV = HP OpenVMS PI = HP Printing & Imaging ST = HP Storage SW TL = HP Trusted Linux TU = HP Tru64 UNIX UX = HP-UX VV = HP VirtualVault System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." Copyright 2009 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental,special or consequential damages including downtime cost; lost profits;damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk0JQB8ACgkQ4B86/C0qfVmfGwCeOT1oSjH7NZVlEmixFnjM5hWp gtAAnj1pfPTQUHenOf3lzoRYLUEoy6xf =/E+O -----END PGP SIGNATURE----- . Scott Kitterman noted that python-dns is vulnerable to this predictability, as it randomizes neither its transaction ID nor its source port. Taken together, this lack of entropy leaves applications using python-dns to perform DNS queries highly susceptible to response forgery. The Common Vulnerabilities and Exposures project identifies this class of weakness as CVE-2008-1447. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: bind Announcement ID: SUSE-SA:2008:033 Date: Fri, 11 Jul 2008 09:00:00 +0000 Affected Products: openSUSE 10.2 openSUSE 10.3 openSUSE 11.0 SUSE SLES 9 Novell Linux Desktop 9 Open Enterprise Server Novell Linux POS 9 SUSE Linux Enterprise Desktop 10 SP1 SLE SDK 10 SP1 SLE SDK 10 SP2 SUSE Linux Enterprise Server 10 SP1 SUSE Linux Enterprise Desktop 10 SP2 SUSE Linux Enterprise Server 10 SP2 Vulnerability Type: DNS cache poisoning Severity (1-10): 9 SUSE Default Package: no Cross-References: CVE-2008-1447 Content of This Advisory: 1) Security Vulnerability Resolved: DNS cache poisoning 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion The bind daemon is responsible for resolving hostnames in IP addresses and vice versa. The new version of bind uses a random transaction-ID (TRXID) and a random UDP source-port for DNS queries to address DNS cache poisoning attacks possible because of the "birthday paradox" and an attack discovered by Dan Kaminsky. Unfortunately we do not have details about Kaminsky's attack and have to trust the statement that a random UDP source-port is sufficient to stop it. DNS servers that do not support recursive queries or do not use a cache (authoritative only servers) are not vulnerable too. Update packages of bind9 for SLES8 will be available soon. The glibc stub resolver is known to be vulnerable too and we will publish updates as soon as possible. Note, a local attacker can always sniff DNS queries and generate spoofed responses easily. If you use the UDP source-port number of the DNS server in your firewall configuration, for example to let DNS queries through your packetfilter, then you have to take steps to adapt your filter rules to the new behavior of the DNS server. One that is authoritative only and accessible from the Internet to resolve queries for your local systems that are available over the Internet. The other system (caching) is not accessible over the Internet and can be used by internal clients to recursively lookup names and addresses. But we encourage you to install the bind update as soon as possible too. If you use the latest update of pdns-recursor you are not vulnerable to this attack. For the glibc stub resolver bug you can install a local secure DNS for- warder on your machine or make a DNS forwarder available for a protected network. 3) Special Instructions and Notes Please restart the bind daemon after the update. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST Online Update (YOU) tool. YOU detects which updates are required and automatically performs the necessary steps to verify and install them. Alternatively, download the update packages for your distribution manually and verify their integrity by the methods listed in Section 6 of this announcement. Then install the packages using the command rpm -Fhv <file.rpm> to apply the update, replacing <file.rpm> with the filename of the downloaded RPM package. x86 Platform: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-chrootenv-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-devel-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-doc-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-libs-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-utils-9.4.2-39.2.i586.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-chrootenv-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-devel-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-doc-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-libs-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-utils-9.4.1.P1-12.5.i586.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-chrootenv-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-devel-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-doc-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-libs-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-utils-9.3.5P1-0.1.i586.rpm x86-64 Platform: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/x86_64/bind-libs-32bit-9.4.2-39.2.x86_64.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/x86_64/bind-libs-32bit-9.4.1.P1-12.5.x86_64.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-libs-32bit-9.3.5P1-0.1.x86_64.rpm Sources: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/src/bind-9.4.2-39.2.src.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/src/bind-9.4.1.P1-12.5.src.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/src/bind-9.3.5P1-0.1.src.rpm Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: Open Enterprise Server http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html Novell Linux POS 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html Novell Linux Desktop 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html SUSE SLES 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html SUSE Linux Enterprise Server 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Server 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SLE SDK 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise 10 SP2 DEBUGINFO http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SLE SDK 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Desktop 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Desktop 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: none ______________________________________________________________________________ 6) Authenticity Verification and Additional Information - Announcement authenticity verification: SUSE security announcements are published via mailing lists and on Web sites. The authenticity and integrity of a SUSE security announcement is guaranteed by a cryptographic signature in each announcement. All SUSE security announcements are published with a valid signature. To verify the signature of the announcement, save it as text into a file and run the command gpg --verify <file> replacing <file> with the name of the file where you saved the announcement. The output for a valid signature looks like: gpg: Signature made <DATE> using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team <security@suse.de>" where <DATE> is replaced by the date the document was signed. If the security team's key is not contained in your key ring, you can import it from the first installation CD. To import the key, use the command gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc - Package authenticity verification: SUSE update packages are available on many mirror FTP servers all over the world. While this service is considered valuable and important to the free and open source software community, the authenticity and the integrity of a package needs to be verified to ensure that it has not been tampered with. The internal rpm package signatures provide an easy way to verify the authenticity of an RPM package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, replacing <file.rpm> with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from build@suse.de with the key ID 9C800ACA. This key is automatically imported into the RPM database (on RPMv4-based distributions) and the gpg key ring of 'root' during installation. You can also find it on the first installation CD and at the end of this announcement. - SUSE runs two security mailing lists to which any interested party may subscribe: opensuse-security@opensuse.org - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security+subscribe@opensuse.org>. opensuse-security-announce@opensuse.org - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security-announce+subscribe@opensuse.org>. ===================================================================== SUSE's security contact is <security@suse.com> or <security@suse.de>. The <security@suse.de> public key is listed below. ===================================================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, the clear text signature should show proof of the authenticity of the text. SUSE Linux Products GmbH provides no warranties of any kind whatsoever with respect to the information contained in this security advisory. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

security feature problem

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES