Tag Archives: Encoding Error

CWE-172 – Encoding Error

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Description

The software does not properly encode or decode the data, resulting in unexpected values.

Modes of Introduction:

– Implementation

 

 

Related Weaknesses

CWE-707
CWE-22
CWE-41

 

Consequences

Integrity: Unexpected State

 

Potential Mitigations

Phase: Implementation

Description: 

Phase: Implementation

Description: 

While it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments. The most conservative approach is to escape or filter all characters that do not pass an extremely strict allowlist (such as everything that is not alphanumeric or white space). If some special characters are still needed, such as white space, wrap each argument in quotes after the escaping/filtering step. Be careful of argument injection (CWE-88).

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