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)
121 lines
4.2 KiB
Text
121 lines
4.2 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-08:02.libc Security Advisory
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The FreeBSD Project
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Topic: inet_network() buffer overflow
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Category: core
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Module: libc
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Announced: 2008-01-14
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Credits: Bjoern A. Zeeb and Nate Eldredge
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Affects: FreeBSD 6.2
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Corrected: 2008-01-14 22:57:45 UTC (RELENG_7, 7.0-PRERELEASE)
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2008-01-14 22:55:54 UTC (RELENG_7_0, 7.0-RC2)
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2008-01-14 22:56:05 UTC (RELENG_6, 6.3-PRERELEASE)
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2008-01-14 22:56:18 UTC (RELENG_6_3, 6.3-RELEASE)
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2008-01-14 22:56:44 UTC (RELENG_6_2, 6.2-RELEASE-p10)
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CVE Name: CVE-2008-0122
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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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The resolver is the part of libc that resolves hostnames (example.com) to
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internet protocol (IP) addresses (192.0.2.1) and vice versa.
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The inet_network() function returns an in_addr_t representing the network
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address of the IP address given to inet_network() as a character string in
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the dot-notation.
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II. Problem Description
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An off-by-one error in the inet_network() function could lead to memory
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corruption with certain inputs.
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III. Impact
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For programs which passes untrusted data to inet_network(), an
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attacker may be able to overwrite a region of memory with user defined
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data by causing specially crafted input to be passed to
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inet_network().
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Depending on the region of memory the attacker is able to overwrite,
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this might lead to a denial of service or potentially code execution
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in the program using inet_network().
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IV. Workaround
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No workaround is available.
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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 7.0-PRERELEASE, or 6-STABLE, or
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to the, RELENG_7_0, RELENG_6_3, or RELENG_6_2 security branch dated
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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 7.0, 6.3,
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or 6.2 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 http://security.FreeBSD.org/patches/SA-08:02/libc.patch
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# fetch http://security.FreeBSD.org/patches/SA-08:02/libc.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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c) Recompile the operating system as described in
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<URL: http://www.freebsd.org/handbook/makeworld.html> and reboot the
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system.
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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_6
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src/lib/libc/inet/inet_network.c 1.2.2.2
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RELENG_6_3
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src/UPDATING 1.416.2.37.2.3
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src/sys/conf/newvers.sh 1.69.2.15.2.3
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src/lib/libc/inet/inet_network.c 1.2.2.1.4.1
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RELENG_6_2
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src/UPDATING 1.416.2.29.2.13
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src/sys/conf/newvers.sh 1.69.2.13.2.13
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src/lib/libc/inet/inet_network.c 1.2.2.1.2.1
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RELENG_7
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src/lib/libc/inet/inet_network.c 1.4.2.1
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RELENG_7_0
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src/UPDATING 1.507.2.3.2.1
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src/sys/conf/newvers.sh 1.72.2.5.2.2
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src/lib/libc/inet/inet_network.c 1.4.4.1
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0122
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The latest revision of this advisory is available at
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http://security.FreeBSD.org/advisories/FreeBSD-SA-08:02.libc.asc
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