CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
- Abstraction:Base
- Structure:Simple
- Status:Incomplete
- Release Date:2006-07-19
- Latest Modification Date:2023-06-29
Weakness Name
Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Description
If a web server does not fully parse requested URLs before it examines them for authorization, it may be possible for an attacker to bypass authorization protection.
For instance, the character strings /./ and / both mean current directory. If /SomeDirectory is a protected directory and an attacker requests /./SomeDirectory, the attacker may be able to gain access to the resource if /./ is not converted to / before the authorization check is performed.
Common Consequences
Scope: Access Control
Impact: Bypass Protection Mechanism