CWE-436
Interpretation Conflict
Description
Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state.
This is generally found in proxies, firewalls, anti-virus software, and other intermediary devices that monitor, allow, deny, or modify traffic based on how the client or server is expected to behave.
Parent Weaknesses (ChildOf)
Common Consequences
Scope
Impact
Unexpected State, Varies by Context
CVE-2005-1215Bypass filters or poison web cache using requests with multiple Content-Length headers, a non-standard behavior.
CVE-2002-0485Anti-virus product allows bypass via Content-Type and Content-Disposition headers that are mixed case, which are still processed by some clients.
CVE-2002-1978FTP clients sending a command with "PASV" in the argument can cause firewalls to misinterpret the server's error as a valid response, allowing filter bypass.
CVE-2002-1979FTP clients sending a command with "PASV" in the argument can cause firewalls to misinterpret the server's error as a valid response, allowing filter bypass.
CVE-2002-0637Virus product bypass with spaces between MIME header fields and the ":" separator, a non-standard message that is accepted by some clients.
CVE-2002-1777AV product detection bypass using inconsistency manipulation (file extension in MIME Content-Type vs. Content-Disposition field).
CVE-2005-3310CMS system allows uploads of files with GIF/JPG extensions, but if they contain HTML, Internet Explorer renders them as HTML instead of images.
CVE-2005-4260Interpretation conflict allows XSS via invalid "<" when a ">" is expected, which is treated as ">" by many web browsers.
CVE-2005-4080Interpretation conflict (non-standard behavior) enables XSS because browser ignores invalid characters in the middle of tags.
Applicable Platforms
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