CVE-2009-0362

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-02-13 · updated 2026-06-16
Weakness: CWE-287

Description

filter.d/wuftpd.conf in Fail2ban 0.8.3 uses an incorrect regular expression that allows remote attackers to cause a denial of service (forced authentication failures) via a crafted reverse-resolved DNS name (rhost) entry that contains a substring that is interpreted as an IP address, a different vulnerability than CVE-2007-4321.

Affected products

fail2ban: 0.8.3

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514163
http://secunia.com/advisories/33890
http://www.securityfocus.com/bid/33734
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514163
http://secunia.com/advisories/33890
http://www.securityfocus.com/bid/33734

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