GLSA 200702-03: Snort: Denial of Service
| Severity: | normal |
| Title: | Snort: Denial of Service |
| Date: | 02/13/2007 |
| Bugs: | |
| ID: | 200702-03 |
Synopsis
Snort contains a vulnerability in the rule matching algorithm that could result in a Denial of Service.Background
Snort is a widely deployed intrusion detection program.
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| net-analyzer/snort | < 2.6.1.2 | >= 2.6.1.2 | All supported architectures |
Description
Randy Smith, Christian Estan and Somesh Jha discovered that the rule matching algorithm of Snort can be exploited in a way known as a "backtracking attack" to perform numerous time-consuming operations.
Impact
A remote attacker could send specially crafted network packets, which would result in the cessation of the detections and the consumption of the CPU resources.
Workaround
There is no known workaround at this time.
Resolution
All Snort users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/snort-2.6.1.2"
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.