ID

VAR-201602-0272

CVE

CVE-2015-3197

TITLE

OpenSSL re-uses unsafe prime numbers in Diffie-Hellman protocol

DESCRIPTION

ssl/s2_srvr.c in OpenSSL 1.0.1 before 1.0.1r and 1.0.2 before 1.0.2f does not prevent use of disabled ciphers, which makes it easier for man-in-the-middle attackers to defeat cryptographic protection mechanisms by performing computations on SSLv2 traffic, related to the get_client_master_key and get_client_hello functions. OpenSSL may generate unsafe primes for use in the Diffie-Hellman protocol, which may lead to disclosure of enough information for an attacker to recover the private encryption key. Network traffic encrypted using an RSA-based SSL certificate may be decrypted if enough SSLv2 handshake data can be collected. This is known as the "DROWN" attack in the media. OpenSSL is prone to a security-bypass vulnerability. Successfully exploiting this issue may allow attackers to perform unauthorized actions. This may lead to other attacks. Cisco Unified Computing System Central Software is prone to an arbitrary command-execution vulnerability. An attacker can exploit this issue to execute system commands on the underlying operating system. This issue being tracked by Cisco Bug ID CSCut46961. Relevant releases/architectures: RHEL 7-based RHEV-H - noarch RHEV Hypervisor for RHEL-6 - noarch 3. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. (CVE-2015-3197) A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys. (CVE-2016-0702) A double-free flaw was found in the way OpenSSL parsed certain malformed DSA (Digital Signature Algorithm) private keys. An attacker could create specially crafted DSA private keys that, when processed by an application compiled against OpenSSL, could cause the application to crash. (CVE-2016-0705) An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. Changes to the rhev-hypervisor component: * Previously, a race between services during boot prevented network configuration from upgrading correctly. The risk for the race has now been reduced significantly to allow the upgrade of the network configuration to complete correctly. (BZ#1194068) * Previously, using the text user interface (TUI) to log in to the administrator account of Red Hat Enterprise Virtualization Hypervisor failed with a Python backtrace. This update makes the "six" module correctly importable under all circumstances, which ensures that logging in to Red Hat Enterprise Virtualization Hypervisor using TUI proceeds as expected. (BZ#1246836) 4. Here are the details from the Slackware 14.1 ChangeLog: +--------------------------+ patches/packages/openssl-1.0.1r-i486-1_slack14.1.txz: Upgraded. For more information, see: https://openssl.org/news/secadv/20160128.txt https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3197 (* Security fix *) patches/packages/openssl-solibs-1.0.1r-i486-1_slack14.1.txz: Upgraded. +--------------------------+ Where to find the new packages: +-----------------------------+ Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-) Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you. Updated packages for Slackware 14.0: ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/openssl-1.0.1r-i486-1_slack14.0.txz ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/openssl-solibs-1.0.1r-i486-1_slack14.0.txz Updated packages for Slackware x86_64 14.0: ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/openssl-1.0.1r-x86_64-1_slack14.0.txz ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/openssl-solibs-1.0.1r-x86_64-1_slack14.0.txz Updated packages for Slackware 14.1: ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/openssl-1.0.1r-i486-1_slack14.1.txz ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/openssl-solibs-1.0.1r-i486-1_slack14.1.txz Updated packages for Slackware x86_64 14.1: ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/openssl-1.0.1r-x86_64-1_slack14.1.txz ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/openssl-solibs-1.0.1r-x86_64-1_slack14.1.txz Updated packages for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/a/openssl-solibs-1.0.2f-i586-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/openssl-1.0.2f-i586-1.txz Updated packages for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/a/openssl-solibs-1.0.2f-x86_64-1.txz ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/openssl-1.0.2f-x86_64-1.txz MD5 signatures: +-------------+ Slackware 14.0 packages: 0d6e8d3b27326c84b9996ed189868eba openssl-1.0.1r-i486-1_slack14.0.txz e3cb0b75e9df4be9d8fd1cfcd2fbd306 openssl-solibs-1.0.1r-i486-1_slack14.0.txz Slackware x86_64 14.0 packages: 7b52f4a43b42703a6840945d55f503ee openssl-1.0.1r-x86_64-1_slack14.0.txz eee92cb549bacae21e63bee22b9bb8d4 openssl-solibs-1.0.1r-x86_64-1_slack14.0.txz Slackware 14.1 packages: 5be72ab551b2064aa34c83b42a07ff85 openssl-1.0.1r-i486-1_slack14.1.txz b28e00a7124822258cfd137ab5ce0572 openssl-solibs-1.0.1r-i486-1_slack14.1.txz Slackware x86_64 14.1 packages: 8e0273b1e99e8caa48fcab2547f051e9 openssl-1.0.1r-x86_64-1_slack14.1.txz 60f3994c35679455cab7a984493d1fdb openssl-solibs-1.0.1r-x86_64-1_slack14.1.txz Slackware -current packages: 509771b1f7d58a682feb2099fdf3eb5d a/openssl-solibs-1.0.2f-i586-1.txz d72c0188f4223d1dc2d6080f8d99d92e n/openssl-1.0.2f-i586-1.txz Slackware x86_64 -current packages: 0c6653d3c37271f9f1a58a8c0e1f7b40 a/openssl-solibs-1.0.2f-x86_64-1.txz e4ebd1204644ea58e1779187fe071428 n/openssl-1.0.2f-x86_64-1.txz Installation instructions: +------------------------+ Upgrade the packages as root: # upgradepkg openssl-1.0.1r-i486-1_slack14.1.txz openssl-solibs-1.0.1r-i486-1_slack14.1.txz +-----+ Slackware Linux Security Team http://slackware.com/gpg-key security@slackware.com +------------------------------------------------------------------------+ | To leave the slackware-security mailing list: | +------------------------------------------------------------------------+ | Send an email to majordomo@slackware.com with this text in the body of | | the email message: | | | | unsubscribe slackware-security | | | | You will get a confirmation message back containing instructions to | | complete the process. Please do not reply to this email address. Corrected: 2016-01-28 21:42:10 UTC (stable/10, 10.2-STABLE) 2016-01-30 06:12:03 UTC (releng/10.2, 10.2-RELEASE-p12) 2016-01-30 06:12:03 UTC (releng/10.1, 10.1-RELEASE-p29) 2016-01-30 06:09:38 UTC (stable/9, 9.3-STABLE) 2016-01-30 06:12:03 UTC (releng/9.3, 9.3-RELEASE-p36) CVE Name: CVE-2015-3197 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/>. Background FreeBSD includes software from the OpenSSL Project. II. III. Impact An active MITM attacker may be able to force a protocol downgrade to SSLv2, which is a flawed protocol and intercept the communication between client and server. IV. Workaround No workaround is available, but only applications that do not explicitly disable SSLv2 are affected. To determine if a server have SSLv2 enabled, a system administrator can use the following command: % openssl s_client -ssl2 -connect <host>:<port> </dev/null 2>&1 | grep DONE which will print "DONE" if and only if SSLv2 is enabled. Note that this check will not work for services that uses STARTTLS or DTLS. V. Solution 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. Restart all deamons using the library, or reboot the system. 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 Restart all deamons using the library, or reboot the system. 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. [FreeBSD 10.2] # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-10.2.patch # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-10.2.patch.asc # gpg --verify openssl-10.2.patch.asc [FreeBSD 10.1] # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-10.1.patch # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-10.1.patch.asc # gpg --verify openssl-10.1.patch.asc [FreeBSD 9.3] # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-9.3.patch # fetch https://security.FreeBSD.org/patches/SA-16:11/openssl-9.3.patch.asc # gpg --verify openssl-9.3.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 all deamons using the library, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/9/ r295060 releng/9.3/ r295061 stable/10/ r295016 releng/10.1/ r295061 releng/10.2/ r295061 - ------------------------------------------------------------------------- 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. 5.9 server) - i386, ia64, x86_64 3. Description: Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector (mod_jk), JBoss HTTP Connector (mod_cluster), Hibernate, and the Tomcat Native library. JIRA issues fixed (https://issues.jboss.org/): JWS-222 - CVE-2015-0293 openssl: assertion failure in SSLv2 servers [jbews-3.0.0] 6. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: openssl098e security update Advisory ID: RHSA-2016:0372-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0372.html Issue date: 2016-03-09 CVE Names: CVE-2015-0293 CVE-2015-3197 CVE-2016-0703 CVE-2016-0704 CVE-2016-0800 ===================================================================== 1. Summary: Updated openssl098e packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6 and 7. 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 Client (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 3. Description: OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols, as well as a full-strength, general purpose cryptography library. A padding oracle flaw was found in the Secure Sockets Layer version 2.0 (SSLv2) protocol. An attacker can potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections. (CVE-2016-0800) Note: This issue was addressed by disabling the SSLv2 protocol by default when using the 'SSLv23' connection methods, and removing support for weak SSLv2 cipher suites. For more information, refer to the knowledge base article linked to in the References section. It was discovered that the SSLv2 servers using OpenSSL accepted SSLv2 connection handshakes that indicated non-zero clear key length for non-export cipher suites. An attacker could use this flaw to decrypt recorded SSLv2 sessions with the server by using it as a decryption oracle.(CVE-2016-0703) It was discovered that the SSLv2 protocol implementation in OpenSSL did not properly implement the Bleichenbacher protection for export cipher suites. An attacker could use a SSLv2 server using OpenSSL as a Bleichenbacher oracle. A denial of service flaw was found in the way OpenSSL handled SSLv2 handshake messages. (CVE-2015-0293) A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197) Red Hat would like to thank the OpenSSL project for reporting these issues. Upstream acknowledges Nimrod Aviram and Sebastian Schinzel as the original reporters of CVE-2016-0800 and CVE-2015-3197; David Adrian (University of Michigan) and J. Alex Halderman (University of Michigan) as the original reporters of CVE-2016-0703 and CVE-2016-0704; and Sean Burford (Google) and Emilia Käsper (OpenSSL development team) as the original reporters of CVE-2015-0293. All openssl098e users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. For the update to take effect, all services linked to the openssl098e library must be restarted, or the system rebooted. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1202404 - CVE-2015-0293 openssl: assertion failure in SSLv2 servers 1301846 - CVE-2015-3197 OpenSSL: SSLv2 doesn't block disabled ciphers 1310593 - CVE-2016-0800 SSL/TLS: Cross-protocol attack on TLS using SSLv2 (DROWN) 1310811 - CVE-2016-0703 openssl: Divide-and-conquer session key recovery in SSLv2 1310814 - CVE-2016-0704 openssl: SSLv2 Bleichenbacher protection overwrites wrong bytes for export ciphers 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: openssl098e-0.9.8e-20.el6_7.1.src.rpm i386: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm x86_64: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-0.9.8e-20.el6_7.1.x86_64.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: openssl098e-0.9.8e-20.el6_7.1.src.rpm x86_64: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-0.9.8e-20.el6_7.1.x86_64.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: openssl098e-0.9.8e-20.el6_7.1.src.rpm i386: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm ppc64: openssl098e-0.9.8e-20.el6_7.1.ppc.rpm openssl098e-0.9.8e-20.el6_7.1.ppc64.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.ppc.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.ppc64.rpm s390x: openssl098e-0.9.8e-20.el6_7.1.s390.rpm openssl098e-0.9.8e-20.el6_7.1.s390x.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.s390.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.s390x.rpm x86_64: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-0.9.8e-20.el6_7.1.x86_64.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: openssl098e-0.9.8e-20.el6_7.1.src.rpm i386: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm x86_64: openssl098e-0.9.8e-20.el6_7.1.i686.rpm openssl098e-0.9.8e-20.el6_7.1.x86_64.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.i686.rpm openssl098e-debuginfo-0.9.8e-20.el6_7.1.x86_64.rpm Red Hat Enterprise Linux Client (v. 7): Source: openssl098e-0.9.8e-29.el7_2.3.src.rpm x86_64: openssl098e-0.9.8e-29.el7_2.3.i686.rpm openssl098e-0.9.8e-29.el7_2.3.x86_64.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.i686.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: openssl098e-0.9.8e-29.el7_2.3.src.rpm x86_64: openssl098e-0.9.8e-29.el7_2.3.i686.rpm openssl098e-0.9.8e-29.el7_2.3.x86_64.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.i686.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: openssl098e-0.9.8e-29.el7_2.3.src.rpm ppc64: openssl098e-0.9.8e-29.el7_2.3.ppc.rpm openssl098e-0.9.8e-29.el7_2.3.ppc64.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.ppc.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.ppc64.rpm s390x: openssl098e-0.9.8e-29.el7_2.3.s390.rpm openssl098e-0.9.8e-29.el7_2.3.s390x.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.s390.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.s390x.rpm x86_64: openssl098e-0.9.8e-29.el7_2.3.i686.rpm openssl098e-0.9.8e-29.el7_2.3.x86_64.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.i686.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: openssl098e-0.9.8e-29.el7_2.3.src.rpm x86_64: openssl098e-0.9.8e-29.el7_2.3.i686.rpm openssl098e-0.9.8e-29.el7_2.3.x86_64.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.i686.rpm openssl098e-debuginfo-0.9.8e-29.el7_2.3.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-2015-0293 https://access.redhat.com/security/cve/CVE-2015-3197 https://access.redhat.com/security/cve/CVE-2016-0703 https://access.redhat.com/security/cve/CVE-2016-0704 https://access.redhat.com/security/cve/CVE-2016-0800 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/2176731 https://drownattack.com/ https://openssl.org/news/secadv/20160128.txt https://openssl.org/news/secadv/20160301.txt 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFW36N0XlSAg2UNWIIRAqYBAJ98/98OOTx9c6LlkPHMl7SfneXccQCfX2LY BQ+47lH1uQT1a3RxlYkETOk= =TqD1 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce

AFFECTED PRODUCTS