CVE-2007-4321

fail2ban 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 cause a denial of service by adding arbitrary IP addresses to the sshd log file, as demonstrated by logging in via ssh with a client protocol version identification containing an IP address string, a different vector than CVE-2006-6302.

🔗 References (16)

• cve@mitrehttp://bugs.gentoo.org/show_bug.cgi?id=181214
• cve@mitrehttp://osvdb.org/42484
• cve@mitrehttp://secunia.com/advisories/23237
• cve@mitrehttp://secunia.com/advisories/28374
• cve@mitrehttp://security.gentoo.org/glsa/glsa-200707-13.xml
• cve@mitrehttp://www.debian.org/security/2008/dsa-1456
• cve@mitrehttp://www.ossec.net/en/attacking-loganalysis.html
• cve@mitrehttp://www.securityfocus.com/bid/25117
• af854a3a-2127-422b-91ae-364da2661108http://bugs.gentoo.org/show_bug.cgi?id=181214
• af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/42484
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/23237
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/28374
• af854a3a-2127-422b-91ae-364da2661108http://security.gentoo.org/glsa/glsa-200707-13.xml
• af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2008/dsa-1456
• af854a3a-2127-422b-91ae-364da2661108http://www.ossec.net/en/attacking-loganalysis.html