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Gentoo 201406-03 Normal Severity: Fail2ban DoS Threat Advisory

gentoo
Calendar Grey June 1, 2014
Scroller Gentoo
Numerous flaws in Fail2ban may lead to Denial of Service incidents. Urgent updates are advised to reduce potential threats.
Multiple vulnerabilities have been found in Fail2ban, the worst of which allows remote attackers to cause a Denial of Service condition.

Summary

Multiple vulnerabilities have been discovered in Fail2ban. Please review the CVE identifiers referenced below for details.

Topics%20covered

Topics Covered

security advisory denial of service security issue gentoo system update normal severity fail2ban

Resolution

All Fail2ban users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.12

References

[ 1 ] CVE-2009-5023 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-5023 [ 2 ] CVE-2013-2178 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-2178 [ 3 ] CVE-2013-7176 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-7176

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201406-03
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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.

Severity: Normal
Title: Fail2ban: Multiple vulnerabilities
Date: June 01, 2014
Bugs: #364883, #473118, #499802
ID: 201406-03

Topics%20covered

Topics Covered

security advisory denial of service security issue gentoo system update normal severity fail2ban

Synopsis

Multiple vulnerabilities have been found in Fail2ban, the worst of which allows remote attackers to cause a Denial of Service condition.

Background

Fail2ban is a tool for parsing log files and banning IP addresses which show suspicious behavior.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-analyzer/fail2ban < 0.8.12 >= 0.8.12

Impact

===== A remote attacker could send a crafted URL to a web site which, when parsed by Fail2ban, would deny a specific IP address. Also, errors in regular expressions within certain filters can cause arbitrary IP addresses to be banned. Furthermore, a local attacker could perform symlink attacks to overwrite arbitrary files with the privileges of the user running the application.

Workaround

There is no known workaround at this time.