CVE-2007-4321

Summary

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

Weaknesses

• n/a

ADP Enrichment

CVE Program Container

Additional References

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

References

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

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