GLSA 200404-03: Tcpdump Vulnerabilities in ISAKMP Parsing

Severity:high
Title:Tcpdump Vulnerabilities in ISAKMP Parsing
Date:03/31/2004
Bugs: #38206, #46258
ID:200404-03

Synopsis

There are multiple vulnerabilities in tcpdump and libpcap related to parsing of ISAKMP packets.

Background

Tcpdump is a program for monitoring IP network traffic. Libpcap is a supporting library which is responsibile for capturing packets off a network interface.

Affected packages

Package Vulnerable Unaffected Architecture(s)
net-analyzer/tcpdump <= 3.8.1 >= 3.8.3-r1 All supported architectures
net-libs/libpcap <= 0.8.1-r1 >= 0.8.3-r1 All supported architectures

Description

There are two specific vulnerabilities in tcpdump, outlined in [ reference 1 ]. In the first scenario, an attacker may send a specially-crafted ISAKMP Delete packet which causes tcpdump to read past the end of its buffer. In the second scenario, an attacker may send an ISAKMP packet with the wrong payload length, again causing tcpdump to read past the end of a buffer.

Impact

Remote attackers could potentially cause tcpdump to crash or execute arbitrary code as the 'pcap' user.

Workaround

There is no known workaround at this time. All tcpdump users are encouraged to upgrade to the latest available version.

Resolution

All tcpdump users should upgrade to the latest available version. ADDITIONALLY, the net-libs/libpcap package should be upgraded.

    # emerge sync

    # emerge -pv ">=net-libs/libpcap-0.8.3-r1" ">=net-analyzer/tcpdump-3.8.3-r1"
    # emerge ">=net-libs/libpcap-0.8.3-r1" ">=net-analyzer/tcpdump-3.8.3-r1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200404-03.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.

License

Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

Thank you!