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)
133 lines
5 KiB
Text
133 lines
5 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-04:07.cvs Security Advisory
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The FreeBSD Project
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Topic: CVS path validation errors
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Category: contrib
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Module: contrib_cvs
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Announced: 2004-04-15
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Revised: 2004-04-16
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Credits: Sebastian Krahmer <krahmer@suse.de>
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Derek Robert Price <derek@ximbiot.com>
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Affects: All FreeBSD versions prior to 4.10-RELEASE
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Corrected: 2004-04-15 15:35:26 UTC (RELENG_4, 4.10-BETA)
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2004-04-15 15:42:50 UTC (RELENG_5_2, 5.2.1-RELEASE-p5)
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2004-04-15 15:59:05 UTC (RELENG_4_9, 4.9-RELEASE-p5)
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2004-04-15 15:59:54 UTC (RELENG_4_8, 4.8-RELEASE-p18)
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CVE Name: CAN-2004-0180, CAN-2004-0405
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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 2004-04-14 Initial release.
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v1.1 2004-04-15 Added additional CVE name. Corrected affected release
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names. Reworded `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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Two programming errors were discovered in which path names handled by
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CVS were not properly validated. In one case, CAN-2004-0180, the CVS
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client accepts absolute path names from the server when determining
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which files to update. In another case, CAN-2004-0405, the CVS server
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accepts relative path names from the client when determining which
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files to transmit, including those containing references to parent
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directories (`../').
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III. Impact
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These programming errors generally only have a security impact when
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dealing with remote CVS repositories.
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A malicious CVS server may cause a CVS client to overwrite arbitrary
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files on the client's system.
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A CVS client may request RCS files from a remote system other than
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those in the repository specified by $CVSROOT. These RCS files need
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not be part of any CVS repository themselves.
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IV. Workaround
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Users of CVS clients should avoid accessing remote repositories.
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Administrators of CVS repositories should disable remote 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 4.8,
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4.9, 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-04:07/cvs.patch
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# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:07/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/client.c 1.2.2.7
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src/contrib/cvs/src/modules.c 1.1.1.5.2.4
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RELENG_5_2
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src/UPDATING 1.282.2.13
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src/sys/conf/newvers.sh 1.56.2.12
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src/contrib/cvs/src/client.c 1.10.4.1
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src/contrib/cvs/src/modules.c 1.1.1.8.6.2
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RELENG_4_9
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src/UPDATING 1.73.2.89.2.6
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src/sys/conf/newvers.sh 1.44.2.32.2.6
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src/contrib/cvs/src/client.c 1.2.2.6.4.1
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src/contrib/cvs/src/modules.c 1.1.1.5.2.3.4.1
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RELENG_4_8
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src/UPDATING 1.73.2.80.2.21
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src/sys/conf/newvers.sh 1.44.2.29.2.19
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src/contrib/cvs/src/client.c 1.2.2.6.2.1
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src/contrib/cvs/src/modules.c 1.1.1.5.2.3.2.1
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- -------------------------------------------------------------------------
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VII. References
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http://ccvs.cvshome.org/servlets/NewsItemView?newsID=102
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