CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization

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

Related Weaknesses

CWE-696Incorrect Behavior Order

CWE-863Incorrect AuthorizationHigh