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)
99 lines
3.2 KiB
Text
99 lines
3.2 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-07:10.gtar Security Advisory
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The FreeBSD Project
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Topic: gtar directory traversal vulnerability
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Category: contrib
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Module: contrib_tar
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Announced: 2007-11-29
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Credits: Dmitry V. Levinx
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Affects: FreeBSD 5.x releases
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Corrected: 2007-11-29 16:08:54 UTC (RELENG_5, 5.5-STABLE)
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2007-11-29 16:09:26 UTC (RELENG_5_5, 5.5-RELEASE-p17)
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CVE Name: CVE-2007-4131
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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 <URL:http://security.FreeBSD.org/>.
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I. Background
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GNU tar (gtar) is a utility to create and extract "tape archives",
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commonly known as tar files. GNU tar is included in FreeBSD 5.x as
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/usr/bin/gtar.
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II. Problem Description
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Insufficient sanity checking of paths containing '.' and '..' allows
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gtar to overwrite arbitrary files on the system.
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III. Impact
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An attacker who can convince an user to extract a specially crafted
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archive can overwrite arbitrary files with the permissions of the user
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running gtar. If that user is root, the attacker can overwrite any
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file on the system.
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IV. Workaround
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Use "bsdtar", which has been the default tar implementation since
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FreeBSD 5.3.
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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 5-STABLE, or to the RELENG_5_5
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security branch dated after the correction 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 5.5
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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 http://security.FreeBSD.org/patches/SA-07:10/gtar.patch
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# fetch http://security.FreeBSD.org/patches/SA-07:10/gtar.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/tar
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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_5
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src/contrib/tar/src/misc.c 1.3.8.1
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RELENG_5_5
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src/UPDATING 1.342.2.35.2.17
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src/sys/conf/newvers.sh 1.62.2.21.2.19
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src/contrib/tar/src/misc.c 1.3.20.1
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4131
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-07:10.gtar.asc
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