Input validation error in Fail2ban - CVE-2012-5642
Published: December 31, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU43223
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2012-5642
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
server/action.py in Fail2ban before 0.8.8 does not properly handle the content of the matches tag, which might allow remote attackers to trigger unsafe behavior in a custom action file via unspecified symbols in this content.
Affected software
Fail2ban
Fedora
fail2ban
Fedora
fail2ban
How to mitigate CVE-2012-5642
Install update from vendor's website.
fail2ban - update to 0.8.8-1.el6
External References
- http://lists.opensuse.org/opensuse-updates/2013-04/msg00001.html
- http://lists.opensuse.org/opensuse-updates/2013-04/msg00002.html
- http://sourceforge.net/mailarchive/message.php?msg_id=30193056
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:078
- http://www.openwall.com/lists/oss-security/2012/12/17/2
- https://bugs.gentoo.org/show_bug.cgi?id=447572
- https://bugzilla.redhat.com/show_bug.cgi?id=887914
- https://github.com/fail2ban/fail2ban/commit/83109bc
- https://raw.github.com/fail2ban/fail2ban/master/ChangeLog