-----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 . 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-----