Title: Fail2ban: Denial of Service ([glsa=200702-05]GLSA 200702-05[/glsa])
Severity: normal
Exploitable: remote
Date: February 16, 2007
Bug(s): #157166
ID: 200702-05
Synopsis
A flaw in Fail2ban may allow remote attackers to deny access to arbitrary
hosts.
Background
Fail2ban monitors log files for failed authentication attempts and can
block hosts responsible for repeated attacks.
Affected Packages
Package: net-analyzer/fail2ban
Vulnerable: < 0.6.2
Unaffected: >= 0.6.2
Architectures: All supported architectures
Description
A flaw in the method used to parse log entries allows remote,
unauthenticated attackers to forge authentication attempts from other
hosts.
Impact
A remote attacker can add arbitrary hosts to the block list, denying
legitimate users access to a resource.
Workaround
There is no known workaround at this time.
Resolution
All Fail2ban users should upgrade to the latest version:
Code: Select all
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.6.2"References
CVE-2006-6302