3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
137 lines
5.2 KiB
Text
137 lines
5.2 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-04:10.cvs Security Advisory
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The FreeBSD Project
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Topic: CVS pserver protocol parser errors
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Category: contrib
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Module: contrib_cvs
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Announced: 2004-05-19
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Revised: 2004-05-20
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Credits: Stefan Esser <s.esser@e-matters.de>
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Affects: All FreeBSD versions
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Corrected: 2004-05-20 13:17:16 UTC (RELENG_4, 4.10-PRERELEASE)
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2004-05-20 13:17:42 UTC (RELENG_4_10, 4.10-RC)
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2004-05-20 13:18:08 UTC (RELENG_4_9, 4.9-RELEASE-p8)
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2004-05-20 13:18:07 UTC (RELENG_4_8, 4.8-RELEASE-p21)
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2004-05-20 13:18:06 UTC (RELENG_4_7, 4.7-RELEASE-p27)
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2004-05-20 13:18:10 UTC (RELENG_5_2, 5.2.1-RELEASE-p7)
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2004-05-20 13:18:09 UTC (RELENG_5_1, 5.1-RELEASE-p17)
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2004-05-20 13:18:09 UTC (RELENG_5_0, 5.0-RELEASE-p21)
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CVE Name: CAN-2004-0396
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FreeBSD only: NO
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For general information regarding FreeBSD Security Advisories,
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including descriptions of the fields above, security branches, and the
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following sections, please visit
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<URL:http://www.freebsd.org/security/>.
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0. Revision History
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v1.0 2004-05-19 Initial release.
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v1.1 2004-05-19 Adjusted correction dates and reference URL.
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v1.2 2004-05-20 Updated patch to work around bugs in some CVS clients.
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v1.3 2004-06-05 Corrected the workaround section.
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I. Background
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The Concurrent Versions System (CVS) is a version control system. It
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may be used to access a repository locally, or to access a `remote
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repository' using a number of different methods. When accessing a
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remote repository, the target machine runs the CVS server to fulfill
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client requests.
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II. Problem Description
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Due to a programming error in code used to parse data received from
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the client, malformed data can cause a heap buffer to overflow,
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allowing the client to overwrite arbitrary portions of the server's
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memory.
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III. Impact
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A malicious CVS client may run arbitrary code on the server at the
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privilege level of the CVS server software.
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IV. Workaround
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Administrators of CVS repositories should disable anonymous remote
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access.
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V. Solution
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Perform one of the following:
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1) Upgrade your vulnerable system to 4-STABLE; or to the RELENG_5_2,
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RELENG_4_9, or RELENG_4_8 security branch dated after the correction
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date.
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2) To patch your present system:
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The following patches have been verified to apply to FreeBSD 4.7, 4.8,
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4.9, 4.10, 5.0, 5.1, and 5.2 systems.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:10/cvs.patch
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# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:10/cvs.patch.asc
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b) Execute the following commands as root:
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# cd /usr/src
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# patch < /path/to/patch
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# cd /usr/src/gnu/usr.bin/cvs
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# make obj && make depend && make && make install
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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in FreeBSD.
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Branch Revision
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Path
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- -------------------------------------------------------------------------
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RELENG_4
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src/contrib/cvs/src/server.c 1.13.2.7
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RELENG_4_10
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src/contrib/cvs/src/server.c 1.13.2.5.6.2
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RELENG_4_9
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src/UPDATING 1.73.2.89.2.9
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src/sys/conf/newvers.sh 1.44.2.32.2.9
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src/contrib/cvs/src/server.c 1.13.2.5.4.2
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RELENG_4_8
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src/UPDATING 1.73.2.80.2.24
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src/sys/conf/newvers.sh 1.44.2.29.2.22
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src/contrib/cvs/src/server.c 1.13.2.5.2.2
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RELENG_4_7
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src/UPDATING 1.73.2.74.2.31
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src/sys/conf/newvers.sh 1.44.2.26.2.29
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src/contrib/cvs/src/server.c 1.13.2.2.6.3
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RELENG_5_2
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src/UPDATING 1.282.2.15
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src/sys/conf/newvers.sh 1.56.2.14
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src/contrib/cvs/src/server.c 1.19.4.3
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RELENG_5_1
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src/UPDATING 1.251.2.19
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src/sys/conf/newvers.sh 1.50.2.19
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src/contrib/cvs/src/server.c 1.19.2.2
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RELENG_5_0
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src/UPDATING 1.229.2.27
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src/sys/conf/newvers.sh 1.48.2.22
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src/contrib/cvs/src/server.c 1.17.2.3
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- -------------------------------------------------------------------------
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VII. References
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http://ccvs.cvshome.org/servlets/NewsItemView?newsID=107
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