CWE-205 Detail

CWE-205

Name

Observable Behavioral Discrepancy

Status

Incomplete

Published

2006-07-19
00h00 +00:00

Modified

2023-06-29
00h00 +00:00

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CWE Mitre.org

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Name: Observable Behavioral Discrepancy

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.

CWE Description

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.

General Informations

Modes Of Introduction

Architecture and Design
Implementation

Applicable Platforms

Language

Class: Not Language-Specific (Undetermined)

Common Consequences

Scope	Impact	Likelihood
Confidentiality Access Control	Read Application Data, Bypass Protection Mechanism

Observed Examples

References	Description
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.

Vulnerability Mapping Notes

Justification : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Comment : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Related Attack Patterns

CAPEC-ID	Attack Pattern Name
CAPEC-541	Application Fingerprinting An adversary engages in fingerprinting activities to determine the type or version of an application installed on a remote target.
CAPEC-580	System Footprinting An adversary engages in active probing and exploration activities to determine security information about a remote target system. Often times adversaries will rely on remote applications that can be probed for system configurations.

Submission

Name	Organization	Date	Date release	Version
PLOVER		2006-07-19 +00:00	2006-07-19 +00:00	Draft 3

Modifications

Name	Organization	Date	Comment
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2008-10-14 +00:00	updated Description
CWE Content Team	MITRE	2009-12-28 +00:00	updated Description, Name
CWE Content Team	MITRE	2010-02-16 +00:00	updated Taxonomy_Mappings
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2012-05-11 +00:00	updated Relationships
CWE Content Team	MITRE	2012-10-30 +00:00	updated Potential_Mitigations
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships
CWE Content Team	MITRE	2017-11-08 +00:00	updated Applicable_Platforms
CWE Content Team	MITRE	2020-02-24 +00:00	updated Description, Name, Observed_Examples, Relationships
CWE Content Team	MITRE	2020-08-20 +00:00	updated Relationships
CWE Content Team	MITRE	2021-10-28 +00:00	updated Relationships
CWE Content Team	MITRE	2023-01-31 +00:00	updated Related_Attack_Patterns
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes