EnGarde Secure Linux alert: 'tcpdump' multiple vulnerabilities.

Posted by dave on Jan 19, 2004 5:57 AM EDT
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Several buffer overflows were recently discovered in tcpdump, a program used for inspecting network traffic. By sending specially constructed packets across the wire a malicious remote attacker could cause tcpdump to crash or potentially run arbitrary code as the user under which tcpdump was being run.

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+------------------------------------------------------------------------+ | Guardian Digital Security Advisory January 19, 2004 | | http://www.guardiandigital.com ESA-20040119-002 | | | | Packages: libpcap, tcpdump | | Summary: multiple vulnerabilities. | +------------------------------------------------------------------------+

EnGarde Secure Linux is an enterprise class Linux platform engineered to enable corporations to quickly and cost-effectively build a complete and secure Internet presence while preventing Internet threats.

OVERVIEW - -------- Several buffer overflows were recently discovered in tcpdump, a program used for inspecting network traffic. By sending specially constructed packets across the wire a malicious remote attacker could cause tcpdump to crash or potentially run arbitrary code as the user under which tcpdump was being run.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the following names to these issues:

CAN-2004-0057 -- The rawprint function in the ISAKMP decoding routines (print-isakmp.c) for tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (segmentation fault) via malformed ISAKMP packets that cause invalid "len" or "loc" values to be used in a loop, a different vulnerability than CAN-2003-0989.

CAN-2003-0989 -- tcpdump before 3.8.1 allows remote attackers to cause a denial of service (infinite loop) via certain ISAKMP packets, a different vulnerability than CAN-2004-0057.

CAN-2003-1029 -- The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (infinite loop and memory consumption) via a packet with invalid data to UDP port 1701, which causes l2tp_avp_print to use a bad length value when calling print_octets.

Guardian Digital products affected by this issue include:

EnGarde Secure Community v1.0.1 EnGarde Secure Community 2 EnGarde Secure Professional v1.1 EnGarde Secure Professional v1.2 EnGarde Secure Professional v1.5

It is recommended that all users apply this update as soon as possible.

SOLUTION - -------- Guardian Digital Secure Network subscribers may automatically update affected systems by accessing their account from within the Guardian Digital WebTool.

To modify your GDSN account and contact preferences, please go to:

https://www.guardiandigital.com/account/

Below are MD5 sums for the updated EnGarde Secure Linux 1.0.1 packages:

SRPMS/tcpdump-3.6.3-1.0.6.src.rpm MD5 Sum: 58cf98bad3b20913edb526ef539cfdc0

i386/libpcap-0.6.2-1.0.6.i386.rpm MD5 Sum: 2dcd5822840fdb9573a898fe631a862f

i386/tcpdump-3.6.3-1.0.6.i386.rpm MD5 Sum: 61e6669119fc841c3dcec5246b2791c3

i686/libpcap-0.6.2-1.0.6.i686.rpm MD5 Sum: 44f6af644c763fd67854c3dcedc2c4c1

i686/tcpdump-3.6.3-1.0.6.i686.rpm MD5 Sum: 127fffc1535823a73fbb0c6961bd4185

REFERENCES - ---------- Guardian Digital's public key: http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY

TCPDUMP's Official Web Site: http://www.tcpdump.org/

Guardian Digital Advisories: http://infocenter.guardiandigital.com/advisories/

Security Contact: [E-mail:security@guardiandigital.com]

- -------------------------------------------------------------------------- Author: Ryan W. Maple Copyright 2004, Guardian Digital, Inc.

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Copyright(c) 2003 Guardian Digital, Inc. GuardianDigital.com ------------------------------------------------------------------------



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