CVE-2013-2178

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-08-28 · updated 2026-06-16
Weakness: CWE-20

Description

The apache-auth.conf, apache-nohome.conf, apache-noscript.conf, and apache-overflows.conf files in Fail2ban before 0.8.10 do not properly validate log messages, which allows remote attackers to block arbitrary IP addresses via certain messages in a request.

Affected products

fail2ban: through 0.8.9; 0.1.0, 0.1.1, 0.1.2, 0.3.0, 0.3.1, 0.4.0 (+29)

References

http://lists.opensuse.org/opensuse-updates/2014-03/msg00021.html
http://www.debian.org/security/2013/dsa-2708
http://www.openwall.com/lists/oss-security/2013/06/13/7
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17338
https://raw.github.com/fail2ban/fail2ban/master/ChangeLog
https://vndh.net/note:fail2ban-089-denial-service
http://lists.opensuse.org/opensuse-updates/2014-03/msg00021.html
http://www.debian.org/security/2013/dsa-2708
http://www.openwall.com/lists/oss-security/2013/06/13/7
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17338
https://raw.github.com/fail2ban/fail2ban/master/ChangeLog
https://vndh.net/note:fail2ban-089-denial-service

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