Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0462 OpenSSL multiple vulnerabilities 3 April 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2013-0169 CVE-2013-0166 Reference: ESB-2013.0161 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-13:03.openssl.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-13:03.openssl Security Advisory The FreeBSD Project Topic: OpenSSL multiple vulnerabilities Category: contrib Module: openssl Announced: 2013-04-02 Affects: All supported versions of FreeBSD. Corrected: 2013-03-08 17:28:40 UTC (stable/8, 8.3-STABLE) 2013-04-02 17:34:42 UTC (releng/8.3, 8.3-RELEASE-p7) 2013-03-14 17:48:07 UTC (stable/9, 9.1-STABLE) 2013-04-02 17:34:42 UTC (releng/9.0, 9.0-RELEASE-p7) 2013-04-02 17:34:42 UTC (releng/9.1, 9.1-RELEASE-p2) CVE Name: CVE-2013-0166, CVE-2013-0169 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. II. Problem Description A flaw in the OpenSSL handling of OCSP response verification could be exploited to cause a denial of service attack. [CVE-2013-0166] OpenSSL has a weakness in the handling of CBC ciphersuites in SSL, TLS and DTLS. The weakness could reveal plaintext in a timing attack. [CVE-2013-0169] III. Impact The Denial of Service could be caused in the OpenSSL server application by using an invalid key. [CVE-2013-0166] A remote attacker could recover sensitive information by conducting an attack via statistical analysis of timing data with crafted packets. [CVE-2013-0169] 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 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. [FreeBSD 8.3 and 9.0] # fetch http://security.FreeBSD.org/patches/SA-13:03/openssl.patch # fetch http://security.FreeBSD.org/patches/SA-13:03/openssl.patch.asc # gpg --verify openssl.patch.asc [FreeBSD 9.1] # fetch http://security.FreeBSD.org/patches/SA-13:03/openssl-9.1.patch # fetch http://security.FreeBSD.org/patches/SA-13:03/openssl-9.1.patch.asc # gpg --verify openssl-9.1.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 the all deamons using the library, or reboot your 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 revision numbers of each file that was corrected in FreeBSD. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r248057 releng/8.3/ r249029 stable/9/ r248272 releng/9.0/ r249029 releng/9.1/ r249029 - - ------------------------------------------------------------------------- VII. References CVE Name: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0169 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0166 The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-13:03.openssl.asc - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlFbGXYACgkQFdaIBMps37ISqACcCovc+NpuH57guiROqIbTfw3P 4RMAn22ppeZnRVfje8up3cyOx/D8CCmI =rQqV - -----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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUVufrO4yVqjM2NGpAQL6hA/+LHJ7z5o5Y8kJN80NAw4sZPYzSgOVplPH ojrCbpOSRJrJFWdeyy2o7XcfUoYHCK5OMPub45hMwKPUqk5wglQtqa8k36vwVF7Q HiHVlkjqTCuYkTJAIqFhgG453zor6dodkDl/A4NSBEbZe5Ya+gsmthIk3fCjQTee W7q13gLBDbXcCP0v7CgHX/Wd7eEh5KzWAShb0bZbKgXZJsufiAubzt0fIiFlZkyU 2dOZXrI3jC2ZtLs6YUixwq+Oztx9aqwAMBpNC4h+A9pWaYVOd1dJBpJmG1TaQnis CSY4PIrjHrfZwOOatvMUKiO8BR9EWVNWHghuGKCmtyghNMODMaTPQHHvjDpCNb/o Bui7x9v8hiL0ZyBodefREBnj49fagiSdvtZJopvBnm1r/+yPsKOjQ+dybxEO7Gmj YS9s46XYUX7ayo4lb99xIj2pd8Yt2npzkSLfyNXH416pS7g5pyErlbmRGYWwRmyN 2gfMklQMAh7JzckkzsanFl1VTgK/rxV2eaIfO6TPAHyVtt63MoGnU3H+HQzou45b DxsA7Ys1mR6RGo7NZLcXbHUaWJcPE6deVfXGUNBtzUwXBi2U0Ro8qNGRnVyN5QTr QqnH3ZwAOGcM/QFBM3zaGY2g1/iY8sifmfV9CLm1B/FCLTvzi2MY8ijcipMG468v 8+pefdD8XqQ= =mLou -----END PGP SIGNATURE-----