The wininet.dll FTP client code in Microsoft Internet Explorer 5.01 and 6 might allow remote attackers to execute arbitrary code via an FTP server response of a specific length that causes a terminating null byte to be written outside of a buffer, which causes heap corruption.
labs.idefense.com/intelligence/vulnerabilities/display.php?id=473
secunia.com/advisories/24156
www.kb.cert.org/vuls/id/613564
www.osvdb.org/31892
www.securityfocus.com/archive/1/462303/100/0/threaded
www.securityfocus.com/bid/22489
www.securitytracker.com/id?1017642
www.us-cert.gov/cas/techalerts/TA07-044A.html
www.vupen.com/english/advisories/2007/0584
docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-016
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1141