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.
| Software | From | Fixed in |
|---|---|---|
| fail2ban / fail2ban | 0.8 | 0.8.x |
- http://bugs.gentoo.org/show_bug.cgi?id=181214
- http://osvdb.org/42484
- http://secunia.com/advisories/23237
- http://secunia.com/advisories/28374
- http://security.gentoo.org/glsa/glsa-200707-13.xml
- http://www.debian.org/security/2008/dsa-1456
- http://www.ossec.net/en/attacking-loganalysis.html
- http://www.securityfocus.com/bid/25117
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