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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.2368 Regression in OpenSSL suite 11 October 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-7052 Reference: ESB-2016.2349 Original Bulletin: https://security.freebsd.org/advisories/FreeBSD-SA-16:27.openssl.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-16:27.openssl Security Advisory The FreeBSD Project Topic: Regression in OpenSSL suite Category: contrib Module: openssl Announced: 2016-10-10 Credits: OpenSSL Project Affects: All supported versions of FreeBSD. Corrected: 2016-09-26 14:30:19 UTC (stable/11, 11.0-STABLE) 2016-09-26 20:26:19 UTC (releng/11.0, 11.0-RELEASE-p1) CVE Name: CVE-2016-7052 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/>. 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. II. Problem Description The OpenSSL version included in FreeBSD 11.0-RELEASE is 1.0.2i. The version has bug fix for CVE-2016-7052, which should have included CRL sanity check, but the check was omitted. III. Impact Any attempt to use CRLs in OpenSSL 1.0.2i will crash with a null pointer exception. IV. Workaround No workaround is available. 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 daemons that use 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 daemons that use 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. # fetch https://security.FreeBSD.org/patches/SA-16:27/openssl.patch # fetch https://security.FreeBSD.org/patches/SA-16:27/openssl.patch.asc # gpg --verify openssl.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 daemons that use 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/11/ r306343 releng/11.0/ r306354 - - ------------------------------------------------------------------------- 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. References <URL:https://www.openssl.org/news/secadv/20160926.txt> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7052> The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-16:27.openssl.asc> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.1.13 (FreeBSD) iQIcBAEBCgAGBQJX+0OlAAoJEO1n7NZdz2rnEPYQAOewieypFMknEi5Q02IBVhcC Bs1sczFLXaSz+4c9lNRi+m6Q5TXbW0MM9ZhZDnoLOXZ9OZ7DsQ0OVJcmWPHCSTkT WAlZgiB5B2xtZpLUNi0XAVPyegh+YxWCKa5mq/e4gC7BL+QhtTQqIlzsNylBDcI0 2Tp5fPfO3vIJlSwPpsUA2peYlm2c75/dusE0+bvWnqickWbEmFdCAd8rzTLrsm9R w5essD2o6BzFPA9j+3X/LNaMI6ZKKa4EkaXXB42KHruDfNTV8dmYL/LLxWs6aj1f Li++71GPh3aZZCA5SCo6NYdI25kg4xORZzqUmYzT856kdmpaemLd8oVT8/ojOCTX CoNtA9yVphhYgfSGLy2BIs0u7U3H16SVjZ1oC5MjTAY6kUsEDt6x2vlKOt5452yN 3v2fHf9I8/ibgo4d4ovpGGzvrj/8EfodmDLhjYP5RcwZH4FW1jCUzXTflsYmPWMi 8+COC+K19MNIXR0M8ajs2M8z2ILc3pOUZ1sdrNhU1jEIyYCl8EDMEU0Bc13XlUKS UE92RKfxIAMh+Zyu44++8UizfOorBVKhQVd+9NthMnfXW6xlnwujjbabam8k2E5V Za4sBQ57JvL9aKrsbmB/hhVnxXE6jYqtp7tagXK+wwULO1SarpRp7HENd50ggH5l yu2DM4rkIcwzTaJEdvyT =5rNc - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. 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: auscert@auscert.org.au 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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