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Vulnerability record · CVE-2013-7176 · published 1 February 2014

CVE-2013-7176: Fail2ban improper input validation vulnerability

Fail2ban · Fail2ban

config/filter.d/postfix.conf in the postfix filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.

5.0 CVSS 2.0 Medium EPSS 3.2% · top 12.2% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

config/filter.d/postfix.conf in the postfix filter in Fail2ban before 0.8.11 allows remote attackers to trigger the blocking of an arbitrary IP address via a crafted e-mail address that matches an improperly designed regular expression.

AV:N/AC:L/Au:N/C:N/I:N/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/2014-03/msg00021.html
http://www.debian.org/security/2014/dsa-2979
http://www.kb.cert.org/vuls/id/686662 US Government Resource
https://github.com/fail2ban/fail2ban/commit/eb2f0c927257120dfc32d2450fd63f1962f38821 ExploitPatch
http://lists.opensuse.org/opensuse-updates/2014-03/msg00021.html
http://www.debian.org/security/2014/dsa-2979
http://www.kb.cert.org/vuls/id/686662 US Government Resource
https://github.com/fail2ban/fail2ban/commit/eb2f0c927257120dfc32d2450fd63f1962f38821 ExploitPatch

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2013-7176), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.