19 May 2014
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0751 OpenSSL NULL pointer deference vulnerability 19 May 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: FreeBSD Operating System: FreeBSD UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-0198 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:10.openssl.asc Comment: This advisory references vulnerabilities in products which run on platforms other than FreeBSD. It is recommended that administrators running openssl check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-14:10.openssl Security Advisory The FreeBSD Project Topic: OpenSSL NULL pointer deference vulnerability Category: contrib Module: openssl Announced: 2014-05-13 Affects: FreeBSD 10.x. Corrected: 2014-05-13 23:19:16 UTC (stable/10, 10.0-STABLE) 2014-05-13 23:22:28 UTC (releng/10.0, 10.0-RELEASE-p3) CVE Name: CVE-2014-0198 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/>. I. Background FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. The TLS protocol supports an alert protocol which can be used to signal the other party with certain failures in the protocol context that may require immediate termination of the connection. II. Problem Description An attacker can trigger generation of an SSL alert which could cause a null pointer deference. III. Impact An attacker may be able to cause a service process that uses OpenSSL to crash, which can be used in a denial-of-service attack. IV. Workaround No workaround is available, but systems that do not use OpenSSL to implement the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols, or not using SSL_MODE_RELEASE_BUFFERS and use the same process to handle multiple SSL connections, are not vulnerable. The FreeBSD base system service daemons and utilities do not use the SSL_MODE_RELEASE_BUFFERS mode. However, many third party software uses this mode to reduce their memory footprint and may therefore be affected by this issue. 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. 2) 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 http://security.FreeBSD.org/patches/SA-14:10/openssl.patch # fetch http://security.FreeBSD.org/patches/SA-14:10/openssl.patch.asc # gpg --verify openssl.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch Recompile the operating system using buildworld and installworld as described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>. Restart all deamons using the library, or reboot the system. 3) 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 VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - - ------------------------------------------------------------------------- stable/10/ r265986 releng/10.0/ r265987 - - ------------------------------------------------------------------------- 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:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References <URL:http://ftp.openbsd.org/pub/OpenBSD/patches/5.5/common/005_openssl.patch.sig> <URL:https://rt.openssl.org/Ticket/Display.html?user=guest&pass=guest&id=3321> <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0198> The latest revision of this advisory is available at <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:10.openssl.asc> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQIcBAEBCgAGBQJTcq5IAAoJEO1n7NZdz2rnNb4QAODp1Pxk3GlTwlptWQkC+DJb bwd2RRtkvkz677JIbdtyM7b5POgUih/NtAF9Yyy/pg8IJcSRiv0f7F5L+maV9nee KGb27zizWOgIqor6HhRAv2OniVN271OfoyCkt0xRmigBR6dQ80iBVuCk6McvxvjL 5Yfw8wtfF8zAo5p1d4V3EEPOIVPwgJ31YnB/sVv+SyV6Ldl5DS0Gp1Cm9KjvaJUI CUIljIaH6AFuzs671V4DpuFPtFPIsvGUhEdpf6+ypVJN1J/D+BNRvoIX1zxou4Kf 34qB6cs/LlyBKCPctK/qLU7UScNsuUItpWrw5ESHFHdgsTr8XA9POxU72wlCRCoQ T2A6zIqPQRgCWfrPnmJNwLN9riMQGc2oFBXd19iITyc8/7OcXAFnzIy+zu++jZp6 rMwGIUCg5UKkSGVWnoYyS/1SQRYqi4MzUqC/AwpQHKoE5CqUzVCJ7zGTFcsie0o4 wfWoFlkgbNl0Attn4HLuXncjvGVCMeWqUERKBU7xIxC1D5PKXF5QmCUqlZrddBaw ATIFsPEopu2bX/+sbgcGKSF5WAWwdT92vIgarjW3UkKDYihRNKusrOwp3sue7Iw+ QIweOaJLqpSnfQ3me62I3fWYjRwceeASeTx7dYdxrK1Dx5DnlN8gGwwhl/7cvoWe Xm6DqYXeQRsIxZ7Ng/PO =4EYM - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: email@example.com Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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