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.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Fail2ban | Fail2ban | 0.8 (including) | 0.8 (including) |
| Fail2ban | Ubuntu | dapper | * |
| Fail2ban | Ubuntu | devel | * |
| Fail2ban | Ubuntu | edgy | * |
| Fail2ban | Ubuntu | feisty | * |
| Fail2ban | Ubuntu | gutsy | * |
| Fail2ban | Ubuntu | hardy | * |
| Fail2ban | Ubuntu | intrepid | * |
| Fail2ban | Ubuntu | jaunty | * |
| Fail2ban | Ubuntu | karmic | * |
References
- 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
- 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