CVE-2009-3622 Information
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Algorithmic complexity vulnerability in wp-trackback.php in WordPress before 2.8.5 allows remote attackers to cause a denial of service (CPU consumption and server hang) via a long title parameter in conjunction with a charset parameter composed of many comma-separated \UTF-8\ substrings related to the mb_convert_encoding function in PHP.
Reference
http://codes.zerial.org/php/wp-trackbacks_dos.phps http://marc.info/?l=oss-security&m=125612393329041&w=2 http://marc.info/?l=oss-security&m=125614592004825&w=2 http://rooibo.wordpress.com/2009/10/17/agujero-de-seguridad-en-wordpress/ http://seclists.org/fulldisclosure/2009/Oct/263 http://secunia.com/advisories/37088 http://security-sh3ll.blogspot.com/2009/10/wordpress-resource-exhaustion-denial-of.html http://securitytracker.com/id?1023072 http://wordpress.org/development/2009/10/wordpress-2-8-5-hardening-release/ http://www.osvdb.org/59077 http://www.vupen.com/english/advisories/2009/2986 https://bugzilla.redhat.com/show_bug.cgi?id=530056 https://exchange.xforce.ibmcloud.com/vulnerabilities/53884