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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2005.0332 -- FreeBSD-SA-05:05.cvs Multiple vulnerabilities in CVS 26 April 2005 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: cvs Publisher: FreeBSD Operating System: FreeBSD 5.x releases prior to 5.4-RELEASE FreeBSD 4.x releases UNIX variants Impact: Execute Arbitrary Code/Commands Denial of Service Access: Remote/Unauthenticated CVE Names: CAN-2005-0753 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/Advisories/FreeBSD-SA-05:05.cvs.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-05:05.cvs Security Advisory The FreeBSD Project Topic: Multiple vulnerabilities in CVS Category: contrib Module: cvs Announced: 2005-04-22 Credits: Alen Zukich Affects: All FreeBSD 4.x releases All FreeBSD 5.x releases prior to 5.4-RELEASE Corrected: 2005-04-22 18:01:04 UTC (RELENG_5, 5.4-STABLE) 2005-04-22 18:03:18 UTC (RELENG_5_4, 5.4-RELEASE) 2005-04-22 18:07:10 UTC (RELENG_5_3, 5.3-RELEASE-p10) 2005-04-22 18:13:30 UTC (RELENG_4, 4.11-STABLE) 2005-04-22 18:17:22 UTC (RELENG_4_11, 4.11-RELEASE-p4) 2005-04-22 18:16:15 UTC (RELENG_4_10, 4.10-RELEASE-p9) CVE Name: CAN-2005-0753 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://www.freebsd.org/security/>. I. Background The Concurrent Versions System (CVS) is a version control system. It may be used to access a repository locally, or to access a `remote repository' using a number of different methods. When accessing a remote repository, the target machine runs the CVS server to fulfill client requests. II. Problem Description Multiple programming errors were found in CVS. In one case, variable length strings are copied into a fixed length buffer without adequate checks being made; other errors include NULL pointer dereferences, possible use of uninitialized variables, and memory leaks. III. Impact CVS servers ("cvs server" or :pserver: modes) are affected by these problems. The buffer overflow may potentially be exploited to execute arbitrary code on the CVS server, either in the context of the authenticated user or in the context of the CVS server, depending on the access method used. The other errors may lead to a denial of service. IV. Workaround No workaround is available for cvs servers; cvs clients are unaffected. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 4-STABLE or 5-STABLE, or to the RELENG_5_3, RELENG_4_11, or RELENG_4_10 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 4.10, 4.11, and 5.3 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 4.10] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:05/cvs410.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:05/cvs410.patch.asc [FreeBSD 4.11 and 5.3] # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:05/cvs.patch # fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:05/cvs.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/gnu/usr.bin/cvs # make obj && make depend && make && make install VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - - ------------------------------------------------------------------------- RELENG_4 src/contrib/cvs/src/login.c 1.3.2.6 src/contrib/cvs/src/patch.c 1.1.1.7.2.7 src/contrib/cvs/src/rcs.c 1.19.2.7 RELENG_4_11 src/UPDATING 1.73.2.91.2.5 src/sys/conf/newvers.sh 1.44.2.39.2.8 src/contrib/cvs/src/login.c 1.3.2.5.2.1 src/contrib/cvs/src/patch.c 1.1.1.7.2.6.2.1 src/contrib/cvs/src/rcs.c 1.19.2.6.2.1 RELENG_4_10 src/UPDATING 1.73.2.90.2.10 src/sys/conf/newvers.sh 1.44.2.34.2.11 src/contrib/cvs/src/login.c 1.3.2.4.6.1 src/contrib/cvs/src/patch.c 1.1.1.7.2.5.6.1 src/contrib/cvs/src/rcs.c 1.19.2.5.6.1 RELENG_5 src/contrib/cvs/src/login.c 1.8.2.1 src/contrib/cvs/src/patch.c 1.1.1.13.2.1 src/contrib/cvs/src/rcs.c 1.27.2.1 RELENG_5_4 src/UPDATING 1.342.2.24.2.4 src/contrib/cvs/src/login.c 1.8.6.1 src/contrib/cvs/src/patch.c 1.1.1.13.6.1 src/contrib/cvs/src/rcs.c 1.27.6.1 RELENG_5_3 src/UPDATING 1.342.2.13.2.13 src/sys/conf/newvers.sh 1.62.2.15.2.15 src/contrib/cvs/src/login.c 1.8.4.1 src/contrib/cvs/src/patch.c 1.1.1.13.4.1 src/contrib/cvs/src/rcs.c 1.27.4.1 - - ------------------------------------------------------------------------- VII. References http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0753 http://secunia.com/advisories/14976/ http://xforce.iss.net/xforce/xfdb/20148 The latest revision of this advisory is available at ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:05.cvs.asc - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.0 (FreeBSD) iD8DBQFCaUaaFdaIBMps37IRAvkoAJ47xsv+CGE12jJxGRMZrS8nFgx9XQCfVs5W ZqGIq4p/ylx2yUZvZTjh34o= =ldk9 - -----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. 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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 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== 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 iQCVAwUBQm2WSih9+71yA2DNAQIoRwP/Q6jqgkHLyj9uvXfuEGYst/2ze+13+YO8 ak72u84JKJxoThsR/GbvaYea/sUeaiDE2lYh50Cm29hInwvbr33HWCbSODtcFuDX MADnykkG+1I+m0om7nSjWLzqM+AVVX2hOlsn4QWjfwtyFodkG6HILDmfj8JJ3gBd QhFpUVkf9cg= =LHjr -----END PGP SIGNATURE-----