Input validation error in Fail2ban - CVE-2013-7177
Published: February 1, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU42087
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2013-7177
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Fail2ban
Affected software:
Fail2ban
Fail2ban
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
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.
How to mitigate CVE-2013-7177
Install update from vendor's website.