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)
116 lines
4.4 KiB
Text
116 lines
4.4 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-SA-05:10.tcpdump Security Advisory
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The FreeBSD Project
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Topic: Infinite loops in tcpdump protocol decoding
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Category: contrib
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Module: tcpdump
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Announced: 2005-06-09
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Credits: "Vade 79", Simon L. Nielsen
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Affects: FreeBSD 5.3-RELEASE and FreeBSD 5.4-RELEASE
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Corrected: 2005-06-08 21:26:27 UTC (RELENG_5, 5.4-STABLE)
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2005-06-08 21:27:44 UTC (RELENG_5_4, 5.4-RELEASE-p2)
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2005-06-08 21:29:15 UTC (RELENG_5_3, 5.3-RELEASE-p16)
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CVE Name: CAN-2005-1267, CAN-2005-1278, CAN-2005-1279, CAN-2005-1280
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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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I. Background
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The tcpdump utility is used to capture and examine network traffic.
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II. Problem Description
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Several tcpdump protocol decoders contain programming errors which can
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cause them to go into infinite loops.
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III. Impact
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An attacker can inject specially crafted packets into the network
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which, when processed by tcpdump, could lead to a denial-of-service.
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After the attack, tcpdump would no longer capture traffic, and would
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potentially use all available processor time.
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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 5-STABLE, or to the RELENG_5_4
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or RELENG_5_3 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 5.3 and
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5.4 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-05:10/tcpdump.patch
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# fetch ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-05:10/tcpdump.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/usr.sbin/tcpdump/tcpdump
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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/tcpdump/print-bgp.c 1.1.1.5.2.1
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src/contrib/tcpdump/print-isoclns.c 1.12.2.1
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src/contrib/tcpdump/print-ldp.c 1.1.1.1.2.1
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src/contrib/tcpdump/print-rsvp.c 1.1.1.1.2.1
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RELENG_5_4
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src/UPDATING 1.342.2.24.2.11
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src/sys/conf/newvers.sh 1.62.2.18.2.7
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src/contrib/tcpdump/print-bgp.c 1.1.1.5.6.1
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src/contrib/tcpdump/print-isoclns.c 1.12.6.1
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src/contrib/tcpdump/print-ldp.c 1.1.1.1.6.1
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src/contrib/tcpdump/print-rsvp.c 1.1.1.1.6.1
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RELENG_5_3
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src/UPDATING 1.342.2.13.2.19
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src/sys/conf/newvers.sh 1.62.2.15.2.21
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src/contrib/tcpdump/print-bgp.c 1.1.1.5.4.1
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src/contrib/tcpdump/print-isoclns.c 1.12.4.1
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src/contrib/tcpdump/print-ldp.c 1.1.1.1.4.1
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src/contrib/tcpdump/print-rsvp.c 1.1.1.1.4.1
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- -------------------------------------------------------------------------
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VII. References
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1267
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1278
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1279
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1280
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http://marc.theaimsgroup.com/?l=bugtraq&m=111454406222040
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http://marc.theaimsgroup.com/?l=bugtraq&m=111454461300644
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The latest revision of this advisory is available at
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ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:10.tcpdump.asc
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