GLSA 200404-03: Tcpdump Vulnerabilities in ISAKMP Parsing
| Severity: | high |
| Title: | Tcpdump Vulnerabilities in ISAKMP Parsing |
| Date: | 03/31/2004 |
| Bugs: | , |
| 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:
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.