SB2014020101 - Multiple vulnerabilities in Fail2ban

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2013-7176)

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

2) Input validation error (CVE-ID: CVE-2013-7177)

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.

Remediation

Install update from vendor's website.

References

• 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
• https://github.com/fail2ban/fail2ban/commit/eb2f0c927257120dfc32d2450fd63f1962f38821
• https://github.com/fail2ban/fail2ban/commit/bd175f026737d66e7110868fb50b3760ff75e087