Articles / Debian: New tcpdump package…

Debian: New tcpdump packages fix denial of service

Simon Nielsen discovered that the BGP dissector in tcpdump, a powerful tool for network monitoring and data acquisition, does not properly handle a -1 return value from an internal function that decodes data packets. A specially crafted BGP packet can cause a denial of service via an infinite loop. Fixed packages are available from security.debian.org.
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- --------------------------------------------------------------------------
Debian Security Advisory DSA 854-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
October 9th, 2005                       http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : tcpdump
Vulnerability  : infinite loop
Problem type   : remote
Debian-specific: no
CVE ID         : CAN-2005-1267

Simon Nielsen discovered that the BGP dissector in tcpdump, a powerful
tool for network monitoring and data acquisition, does not properly
handle a -1 return value from an internal function that decodes data
packets.  A specially crafted BGP packet can cause a denial of service
via an infinite loop.

The old stable distribution (woody) is not affected by this problem.

For the stable distribution (sarge) this problem has been fixed in
version 3.8.3-5sarge1.

We recommend that you upgrade your tcpdump package.


Upgrade Instructions
- --------------------

wget url
       will fetch the file for you
dpkg -i file.deb
       will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
       will update the internal database
apt-get upgrade
       will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 3.1 alias sarge
- --------------------------------

 Source archives:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1.dsc
     Size/MD5 checksum:      666 8a61a856f03b483ec3c74affa09e8bb5
   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1.diff.gz
     Size/MD5 checksum:    11493 b2976be14da25de46cf57a95f36739da
   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3.orig.tar.gz
     Size/MD5 checksum:   567116 30645001f4b97019677cad88d3811904

 Alpha architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_alpha.deb
     Size/MD5 checksum:   301288 afbeb130b92fe734031bd60d5819f615

 AMD64 architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_amd64.deb
     Size/MD5 checksum:   256412 7096add9926f7db7d1a915cfe19c0629

 ARM architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_arm.deb
     Size/MD5 checksum:   250446 1846e890ce0ccf7aba4613130d7e2c2d

 Intel IA-32 architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_i386.deb
     Size/MD5 checksum:   238642 1b8e9a1fe69912492e5bc1285e12a1af

 Intel IA-64 architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_ia64.deb
     Size/MD5 checksum:   352410 59e00a553c766e41236647a85c898099

 HP Precision architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_hppa.deb
     Size/MD5 checksum:   271478 0d1d4c3756689ba4efef69a106731c60

 Motorola 680x0 architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_m68k.deb
     Size/MD5 checksum:   216704 a3e4d0279da8563af9da7a6981f2824a

 Big endian MIPS architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_mips.deb
     Size/MD5 checksum:   259316 dc533a53d2bdc886547d345073cf56a8

 Little endian MIPS architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_mipsel.deb
     Size/MD5 checksum:   272054 d5958967c55dc5c08dd3c3c2e546c391

 PowerPC architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_powerpc.deb
     Size/MD5 checksum:   246300 073605199341d90268b8818cf1917f9d

 IBM S/390 architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_s390.deb
     Size/MD5 checksum:   247216 50b1f28f1a86402e26f9155f4a790c39

 Sun Sparc architecture:

   http://security.debian.org/pool/updates/main/t/tcpdump/tcpdump_3.8.3-5sarge1_sparc.deb
     Size/MD5 checksum:   247904 e03f3408ac1bd397cbe8bfdb2c2b4b7b


 These files will probably be moved into the stable distribution on
 its next update.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show ' and http://packages.debian.org/

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