ID

VAR-201412-0615

CVE

CVE-2014-9293

TITLE

NTP Project Network Time Protocol daemon (ntpd) contains multiple vulnerabilities (Updated)

DESCRIPTION

The config_auth function in ntpd in NTP before 4.2.7p11, when an auth key is not configured, improperly generates a key, which makes it easier for remote attackers to defeat cryptographic protection mechanisms via a brute-force attack. The NTP Project ntpd version 4.2.7 and pervious versions contain several vulnerabilities. ntp-keygen prior to version 4.2.7p230 also uses a non-cryptographic random number generator when generating symmetric keys. These vulnerabilities may affect ntpd acting as a server or client. NTP is prone to a security weakness. An attacker can exploit this issue to guess the generated key, and possibly use it to send an ntpdc query or configuration requests. Corrected: 2014-14-22 19:07:16 UTC (stable/10, 10.1-STABLE) 2014-12-23 22:56:01 UTC (releng/10.1, 10.1-RELEASE-p3) 2014-12-23 22:55:14 UTC (releng/10.0, 10.0-RELEASE-p15) 2014-14-22 19:08:09 UTC (stable/9, 9.3-STABLE) 2014-12-23 22:54:25 UTC (releng/9.3, 9.3-RELEASE-p7) 2014-12-23 22:53:44 UTC (releng/9.2, 9.2-RELEASE-p17) 2014-12-23 22:53:03 UTC (releng/9.1, 9.1-RELEASE-p24) 2014-14-22 19:08:09 UTC (stable/8, 8.4-STABLE) 2014-12-23 22:52:22 UTC (releng/8.4, 8.4-RELEASE-p21) CVE Name: CVE-2014-9293, CVE-2014-9294, CVE-2014-9295, CVE-2014-9296 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. II. [CVE-2014-9293] The ntp-keygen(8) utility is also affected by a similar issue. [CVE-2014-9294] When Autokey Authentication is enabled, for example if ntp.conf(5) contains a 'crypto pw' directive, a remote attacker can send a carefully crafted packet that can overflow a stack buffer. [CVE-2014-9296] III. Impact The NTP protocol uses keys to implement authentication. The weak seeding of the pseudo-random number generator makes it easier for an attacker to brute-force keys, and thus may broadcast incorrect time stamps or masquerade as another time server. [CVE-2014-9295] IV. Workaround No workaround is available, but systems not running ntpd(8) are not affected. Because the issue may lead to remote root compromise, the FreeBSD Security Team recommends system administrators to firewall NTP ports, namely tcp/123 and udp/123 when it is not clear that all systems have been patched or have ntpd(8) stopped. V. Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. 2) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install 3) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch https://security.FreeBSD.org/patches/SA-14:31/ntp.patch # fetch https://security.FreeBSD.org/patches/SA-14:31/ntp.patch.asc # gpg --verify ntp.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>. Restart the ntpd(8) daemons, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/8/ r276073 releng/8.4/ r276154 stable/9/ r276073 releng/9.1/ r276155 releng/9.2/ r276156 releng/9.3/ r276157 stable/10/ r276072 releng/10.0/ r276158 releng/10.1/ r276159 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: ntp security update Advisory ID: RHSA-2015:0104-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0104.html Issue date: 2015-01-28 CVE Names: CVE-2014-9293 CVE-2014-9294 CVE-2014-9295 CVE-2014-9296 ===================================================================== 1. Summary: Updated ntp packages that fix several security issues are now available for Red Hat Enterprise Linux 6.5 Extended Update Support. Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.5) - noarch, x86_64 Red Hat Enterprise Linux HPC Node EUS (v. 6.5) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.5) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.5) - i386, noarch, ppc64, s390x, x86_64 3. Description: The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. Multiple buffer overflow flaws were discovered in ntpd's crypto_recv(), ctl_putdata(), and configure() functions. A remote attacker could use either of these flaws to send a specially crafted request packet that could crash ntpd or, potentially, execute arbitrary code with the privileges of the ntp user. Note: the crypto_recv() flaw requires non-default configurations to be active, while the ctl_putdata() flaw, by default, can only be exploited via local attackers, and the configure() flaw requires additional authentication to exploit. (CVE-2014-9293) It was found that ntp-keygen used a weak method for generating MD5 keys. Note: it is recommended to regenerate any MD5 keys that had explicitly been generated with ntp-keygen; the default installation does not contain such keys. (CVE-2014-9294) A missing return statement in the receive() function could potentially allow a remote attacker to bypass NTP's authentication mechanism. (CVE-2014-9296) All ntp users are advised to upgrade to this updated package, which contains backported patches to resolve these issues. After installing the update, the ntpd daemon will restart automatically. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1176032 - CVE-2014-9293 ntp: automatic generation of weak default key in config_auth() 1176035 - CVE-2014-9294 ntp: ntp-keygen uses weak random number generator and seed when generating MD5 keys 1176037 - CVE-2014-9295 ntp: Multiple buffer overflows via specially-crafted packets 1176040 - CVE-2014-9296 ntp: receive() missing return on error 6. Package List: Red Hat Enterprise Linux HPC Node EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.src.rpm x86_64: ntp-4.2.6p5-2.el6_5.x86_64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.x86_64.rpm ntpdate-4.2.6p5-2.el6_5.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.src.rpm noarch: ntp-doc-4.2.6p5-2.el6_5.noarch.rpm x86_64: ntp-debuginfo-4.2.6p5-2.el6_5.x86_64.rpm ntp-perl-4.2.6p5-2.el6_5.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.src.rpm i386: ntp-4.2.6p5-2.el6_5.i686.rpm ntp-debuginfo-4.2.6p5-2.el6_5.i686.rpm ntpdate-4.2.6p5-2.el6_5.i686.rpm ppc64: ntp-4.2.6p5-2.el6_5.ppc64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.ppc64.rpm ntpdate-4.2.6p5-2.el6_5.ppc64.rpm s390x: ntp-4.2.6p5-2.el6_5.s390x.rpm ntp-debuginfo-4.2.6p5-2.el6_5.s390x.rpm ntpdate-4.2.6p5-2.el6_5.s390x.rpm x86_64: ntp-4.2.6p5-2.el6_5.x86_64.rpm ntp-debuginfo-4.2.6p5-2.el6_5.x86_64.rpm ntpdate-4.2.6p5-2.el6_5.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.5): Source: ntp-4.2.6p5-2.el6_5.src.rpm i386: ntp-debuginfo-4.2.6p5-2.el6_5.i686.rpm ntp-perl-4.2.6p5-2.el6_5.i686.rpm noarch: ntp-doc-4.2.6p5-2.el6_5.noarch.rpm ppc64: ntp-debuginfo-4.2.6p5-2.el6_5.ppc64.rpm ntp-perl-4.2.6p5-2.el6_5.ppc64.rpm s390x: ntp-debuginfo-4.2.6p5-2.el6_5.s390x.rpm ntp-perl-4.2.6p5-2.el6_5.s390x.rpm x86_64: ntp-debuginfo-4.2.6p5-2.el6_5.x86_64.rpm ntp-perl-4.2.6p5-2.el6_5.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2014-9293 https://access.redhat.com/security/cve/CVE-2014-9294 https://access.redhat.com/security/cve/CVE-2014-9295 https://access.redhat.com/security/cve/CVE-2014-9296 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFUyTXWXlSAg2UNWIIRAsXzAKCilJuJeeWLOABs1xY+ueRvRTSpWACcDhoC YQlhn66RRMYQCWymo1OCUoI= =4Rft -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Release Date: 2015-02-18 Last Updated: 2015-02-18 Potential Security Impact: Remote execution of code, Denial of Service (DoS), or other vulnerabilities Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified with HP-UX running NTP. These could be exploited remotely to execute code, create a Denial of Service (DoS), or other vulnerabilities. References: CVE-2014-9293 - Insufficient Entropy in Pseudo-Random Number Generator (PRNG) (CWE-332) CVE-2014-9294 - Use of Cryptographically Weak PRNG (CWE-338) CVE-2014-9295 - Stack Buffer Overflow (CWE-121) CVE-2014-9296 - Error Conditions, Return Values, Status Codes (CWE-389) CVE-2014-9297 - Improper Check for Unusual or Exceptional Conditions (CWE-754) SSRT101872 VU#852879 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.31 running NTP version C.4.2.6.4.0 or previous HP-UX B.11.23 running XNTP version 3.5 or previous BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2014-9293 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 CVE-2014-9294 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 CVE-2014-9295 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 CVE-2014-9296 (AV:N/AC:L/Au:N/C:N/I:N/A:P) 5.0 CVE-2014-9297 (AV:N/AC:H/Au:N/C:P/I:N/A:N) 2.6 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided the following patch for HP-UX B.11.31. A workaround for HP-UX B.11.23 and B.11.11 to temporarily resolve these vulnerabilities follows below. The B.11.31 patch is available from: ftp://ntp42650:Secure12@h2.usa.hp.com or https://h20392.www2.hp.com/portal/sw depot/displayProductInfo.do?productNumber=HPUX-NTP Mitigation steps for HP-UX B.11.23 and B.11.11 for CVE-2014-9295 Restrict query for server status (Time Service is not affected) from ntpq/ntpdc by enabling .noquery. using the restrict command in /etc/ntp.conf file. Reference: http://support.ntp.org/bin/view/Main/SecurityNotice NOTE: This bulletin will be revised when patches for XNTP v3.5 on B.11.23 and B.11.11 become available. MANUAL ACTIONS: No 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 Security Bulletins issued by HP 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 The following text is for use by the HP-UX Software Assistant. AFFECTED VERSIONS HP-UX B.11.31 ================== NTP.INETSVCS2-BOOT NTP.NTP-AUX NTP.NTP-RUN action: install revision C.4.2.6.5.0 or subsequent END AFFECTED VERSIONS HISTORY Version:1 (rev.1) - 18 February 2015 Initial release 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 issues about implementing the recommendations of this Security Bulletin, contact normal HP Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hp.com. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com Subscribe: To initiate a subscription to receive future HP Security Bulletin alerts via Email: http://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins Security Bulletin Archive: A list of recently released Security Bulletins is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/ Software Product Category: The Software Product Category is represented in the title by the two characters following HPSB. 3C = 3COM 3P = 3rd Party Software GN = HP General Software HF = HP Hardware and Firmware MP = MPE/iX MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PI = Printing and Imaging PV = ProCurve ST = Storage Software TU = Tru64 UNIX UX = HP-UX Copyright 2015 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. The two patches are available from the HP Support Center (HPSC). Reference: http://support.ntp.org/bin/view/Main/SecurityNotice MANUAL ACTIONS: Yes - Update If patch installation on B.11.11 or B.11.23 is not possible, mitigate with step above. On December 19, 2014, NTP.org and US-CERT released security advisories detailing two issues regarding weak cryptographic pseudorandom number generation (PRNG), three buffer overflow vulnerabilities, and an unhandled error condition with an unknown impact. Cisco will release free software updates that address these vulnerabilities. This situation may be exploitable by an attacker (CVE-2014-9296). Stephen Roettger of the Google Security Team, Sebastian Krahmer of the SUSE Security Team and Harlan Stenn of Network Time Foundation discovered that the length value in extension fields is not properly validated in several code paths in ntp_crypto.c, which could lead to information leakage or denial of service (CVE-2014-9297). Stephen Roettger of the Google Security Team reported that ACLs based on IPv6 ::1 (localhost) addresses can be bypassed (CVE-2014-9298). _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9293 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9294 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9295 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9296 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9297 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9298 http://advisories.mageia.org/MGASA-2014-0541.html http://advisories.mageia.org/MGASA-2015-0063.html _______________________________________________________________________ Updated Packages: Mandriva Business Server 2/X86_64: 8f7d14b95c55bd1de7230cff0c8ea9d7 mbs2/x86_64/ntp-4.2.6p5-16.1.mbs2.x86_64.rpm 09063ab11459b1f935809b37c742ff12 mbs2/x86_64/ntp-client-4.2.6p5-16.1.mbs2.x86_64.rpm 7a0d0eca35911d9f15b76b474c5512cf mbs2/x86_64/ntp-doc-4.2.6p5-16.1.mbs2.noarch.rpm cb0371050702950084ff633ea45c2c5c mbs2/SRPMS/ntp-4.2.6p5-16.1.mbs2.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/en/support/security/advisories/ If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iD8DBQFVF9K3mqjQ0CJFipgRAn26AJwInkxLvDh/Gbb3uYRz9IjuaSK8+ACgiM1Z rou2syvF1hyhVhxh7M5sv3c= =uncU -----END PGP SIGNATURE----- . The default ntpd configuration in Debian restricts access to localhost (and possible the adjacent network in case of IPv6). For the stable distribution (wheezy), these problems have been fixed in version 1:4.2.6.p5+dfsg-2+deb7u1. ============================================================================ Ubuntu Security Notice USN-2449-1 December 22, 2014 ntp vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.10 - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS - Ubuntu 10.04 LTS Summary: Several security issues were fixed in NTP. The default compiler options for affected releases should reduce the vulnerability to a denial of service. In addition, attackers would be isolated by the NTP AppArmor profile. (CVE-2014-9295) Stephen Roettger discovered that NTP incorrectly continued processing when handling certain errors. (CVE-2014-9296) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.10: ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.10.1 Ubuntu 14.04 LTS: ntp 1:4.2.6.p5+dfsg-3ubuntu2.14.04.1 Ubuntu 12.04 LTS: ntp 1:4.2.6.p3+dfsg-1ubuntu3.2 Ubuntu 10.04 LTS: ntp 1:4.2.4p8+dfsg-1ubuntu2.2 After a standard system update you need to regenerate any MD5 keys that were manually created with ntp-keygen. The net-misc/ntp package contains the official reference implementation by the NTP Project. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/ntp < 4.2.8 >= 4.2.8 Description =========== Multiple vulnerabilities have been discovered in NTP. Please review the CVE identifiers referenced below for details. Resolution ========== All NTP users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.8" References ========== [ 1 ] CVE-2014-9293 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9293 [ 2 ] CVE-2014-9294 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9294 [ 3 ] CVE-2014-9295 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9295 [ 4 ] CVE-2014-9296 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-9296 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201412-34.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 https://bugs.gentoo.org. License ======= Copyright 2014 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

AFFECTED PRODUCTS