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Vulnerability record · CVE-2012-5642 · published 31 December 2012

CVE-2012-5642: Fail2ban vulnerability

Fail2ban · Fail2ban

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.

7.5 CVSS 2.0 High EPSS 3.1% · top 12.7%
7.5CVSS 2.0 base score
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 PatchVendor Advisory
https://raw.github.com/fail2ban/fail2ban/master/ChangeLog
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 PatchVendor Advisory
https://raw.github.com/fail2ban/fail2ban/master/ChangeLog

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2012-5642), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.