Description
The software performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor.
Modes of Introduction:
– Architecture and Design
Related Weaknesses
CWE-287
Consequences
Access Control: Bypass Protection Mechanism
Potential Mitigations
Phase: Architecture and Design
Description:
Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.
Phase: Implementation
Description:
Phase: Implementation
Description:
Inputs should be decoded and canonicalized to the application’s current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
CVE References
- CVE-2003-0317
- Protection mechanism that restricts URL access can be bypassed using URL encoding.
- CVE-2004-0847
- Bypass of authentication for files using “” (backslash) or “%5C” (encoded backslash).
