GLSA 200505-06: TCPDump: Decoding routines Denial of Service vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	TCPDump: Decoding routines Denial of Service vulnerability
Date:	05/09/2005
Bugs:	#90541, #95349
ID:	200505-06

Synopsis

A flaw in the decoding of network packets renders TCPDump vulnerable to a remote Denial of Service attack.

Background

TCPDump is a tool for network monitoring and data acquisition.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-analyzer/tcpdump	< 3.8.3-r3	>= 3.8.3-r3	All supported architectures

Description

TCPDump improperly handles and decodes ISIS (CAN-2005-1278), BGP (CAN-2005-1267, CAN-2005-1279), LDP (CAN-2005-1279) and RSVP (CAN-2005-1280) packets. TCPDump might loop endlessly after receiving malformed packets.

Impact

A malicious remote attacker can exploit the decoding issues for a Denial of Service attack by sending specially crafted packets, possibly causing TCPDump to loop endlessly.

Workaround

There is no known workaround at this time.

Resolution

All TCPDump users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-analyzer/tcpdump-3.8.3-r3"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200505-06.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.