Observable Behavioral Discrepancy

Opis

The product's behaviors indicate important differences that may be observed by unauthorized actors in a way that reveals (1) its internal state or decision process, or (2) differences from other products with equivalent functionality.

Ideally, a product should provide as little information about its internal operations as possible. Otherwise, attackers could use knowledge of these internal operations to simplify or optimize their attack. In some cases, behavioral discrepancies can be used by attackers to form a side channel.

Skutki

• Confidentiality, Access Control

  Read Application Data; Bypass Protection Mechanism

Przykłady podatności

• CVE-2002-0208 Product modifies TCP/IP stack and ICMP error messages in unusual ways that show the product is in use.
• CVE-2004-2252 Behavioral infoleak by responding to SYN-FIN packets.

Słabość nadrzędna

• CWE-203 Observable Discrepancy

Może prowadzić do

• CWE-514 Covert Channel

Słabości podrzędne

• CWE-206 Observable Internal Behavioral Discrepancy
• CWE-207 Observable Behavioral Discrepancy With Equivalent Products

Kiedy powstaje

• Architecture and Design
• Implementation

Dotyczy

Not Language-Specific