Incorrect Behavior Order: Validate Before Filter

Opis

The product validates data before it has been filtered, which prevents the product from detecting data that becomes invalid after the filtering step.

This can be used by an attacker to bypass the validation and launch attacks that expose weaknesses that would otherwise be prevented, such as injection.

Inne nazwy

Validate-before-cleanse

Skutki

• Access Control

  Bypass Protection Mechanism

Zapobieganie

• Implementation, Architecture and Design

  Inputs should be decoded and canonicalized to the application's current internal representation before being filtered.

Przykłady podatności

• CVE-2002-0934 Directory traversal vulnerability allows remote attackers to read or modify arbitrary files via invalid characters between two . (dot) characters, which are filtered and result in a ".." sequence.
• CVE-2003-0282 Directory traversal vulnerability allows attackers to overwrite arbitrary files via invalid characters between two . (dot) characters, which are filtered and result in a ".." sequence.

Słabość nadrzędna

• CWE-179 Incorrect Behavior Order: Early Validation

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific

Uwagi

This category is probably under-studied.