Microsoft ISA Server 2000 allows remote attackers to poison the ISA cache or bypass content restriction policies via a malformed HTTP request packet containing multiple Content-Length headers.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1145
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2005/ms05-034
http://www.securityfocus.com/bid/13956