← Vulnerability feed

Vulnerability record · CVE-2013-7177 · published 1 February 2014

CVE-2013-7177: Fail2ban improper input validation vulnerability

Fail2ban · Fail2ban

config/filter.d/cyrus-imap.conf in the cyrus-imap 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/cyrus-imap.conf in the cyrus-imap 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/bd175f026737d66e7110868fb50b3760ff75e087 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/bd175f026737d66e7110868fb50b3760ff75e087 ExploitPatch

Track CVE-2013-7177 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

8.1CVE-2021-32749Fail2ban os command injection vulnerabilityfail2ban is a daemon to ban hosts that cause multiple authentication errors. In versions 0.9.7 and prior, 0.10.0 through 0.10.6, and 0.11.0 through 0…EPSS 3.6%7.5CVE-2012-5642Fail2ban vulnerabilityserver/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 unsa…EPSS 3.1%6.8CVE-2007-4321Fail2ban vulnerabilityfail2ban 0.8 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file and…EPSS 5.7%5.0CVE-2013-7176Fail2ban improper input validation vulnerabilityconfig/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 addre…EPSS 3.2%5.0CVE-2013-2178Fail2ban improper input validation vulnerabilityThe apache-auth.conf, apache-nohome.conf, apache-noscript.conf, and apache-overflows.conf files in Fail2ban before 0.8.10 do not properly validate lo…EPSS 1.8%5.0CVE-2006-6302Fail2ban vulnerabilityfail2ban 0.7.4 and earlier does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the /etc/hosts.deny file a…EPSS 1.8%4.7CVE-2009-5023Fail2ban link following vulnerabilityThe (1) dshield.conf, (2) mail-buffered.conf, (3) mynetwatchman.conf, and (4) mynetwatchman.conf actions in action.d/ in Fail2ban before 0.8.5 allows…EPSS 0.34%4.0CVE-2009-0362Fail2ban improper authentication vulnerabilityfilter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authent…EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2013-7177), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.