CWE-940 Details

CWE-940

Improper Verification of Source of a Communication Channel
Incomplete
2014-02-19
00h00 +00:00
2025-12-11
00h00 +00:00
CWE Mitre.org
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Name: Improper Verification of Source of a Communication Channel

The product establishes a communication channel to handle an incoming request that has been initiated by an actor, but it does not properly verify that the request is coming from the expected origin.

CWE-Beschreibung

When an attacker can successfully establish a communication channel from an untrusted origin, the attacker may be able to gain privileges and access unexpected functionality.

Allgemeine Informationen

Einführungsmodi

Architecture and Design
Implementation : REALIZATION: This weakness is caused during implementation of an architectural security tactic.

Anwendbare Plattformen

Sprache

Class: Not Language-Specific (Undetermined)

Technologien

Class: Mobile (Undetermined)

Häufige Konsequenzen

Bereich Auswirkung Wahrscheinlichkeit
Access Control
Other		Gain Privileges or Assume Identity, Varies by Context, Bypass Protection Mechanism

Note: An attacker can access any functionality that is inadvertently accessible to the source.

Beobachtete Beispiele

Referenzen Beschreibung

CVE-2000-1218

DNS server can accept DNS updates from hosts that it did not query, leading to cache poisoning

CVE-2005-0877

DNS server can accept DNS updates from hosts that it did not query, leading to cache poisoning

CVE-2001-1452

DNS server caches glue records received from non-delegated name servers

Mögliche Gegenmaßnahmen

Phases : Architecture and Design

Hinweise zur Schwachstellen-Zuordnung

Begründung : 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.
Kommentar : 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.

Verwandte Angriffsmuster

CAPEC-ID Name des Angriffsmusters
CAPEC-500 WebView Injection
An adversary, through a previously installed malicious application, injects code into the context of a web page displayed by a WebView component. Through the injected code, an adversary is able to manipulate the DOM tree and cookies of the page, expose sensitive information, and can launch attacks against the web application from within the web page.
CAPEC-594 Traffic Injection
An adversary injects traffic into the target's network connection. The adversary is therefore able to degrade or disrupt the connection, and potentially modify the content. This is not a flooding attack, as the adversary is not focusing on exhausting resources. Instead, the adversary is crafting a specific input to affect the system in a particular way.
CAPEC-595 Connection Reset
In this attack pattern, an adversary injects a connection reset packet to one or both ends of a target's connection. The attacker is therefore able to have the target and/or the destination server sever the connection without having to directly filter the traffic between them.
CAPEC-596 TCP RST Injection
An adversary injects one or more TCP RST packets to a target after the target has made a HTTP GET request. The goal of this attack is to have the target and/or destination web server terminate the TCP connection.

Hinweise

While many access control issues involve authenticating the user, this weakness is more about authenticating the actual source of the communication channel itself; there might not be any "user" in such cases.

Referenzen

REF-324

A Taxonomy of Security Faults in the UNIX Operating System
Taimur Aslam.
https://cwe.mitre.org/documents/sources/ATaxonomyofSecurityFaultsintheUNIXOperatingSystem%5BAslam95%5D.pdf

Einreichung

Name Organisation Datum Veröffentlichungsdatum Version
CWE Content Team MITRE 2014-02-13 +00:00 2014-02-19 +00:00 2.6

Änderungen

Name Organisation Datum Kommentar
CWE Content Team MITRE 2017-11-08 +00:00 updated Modes_of_Introduction, References, Relationships
CWE Content Team MITRE 2019-06-20 +00:00 updated Related_Attack_Patterns
CWE Content Team MITRE 2020-02-24 +00:00 updated Applicable_Platforms, Potential_Mitigations, Relationships
CWE Content Team MITRE 2020-06-25 +00:00 updated Demonstrative_Examples, Potential_Mitigations
CWE Content Team MITRE 2021-07-20 +00:00 updated Potential_Mitigations
CWE Content Team MITRE 2021-10-28 +00:00 updated Relationships
CWE Content Team MITRE 2022-10-13 +00:00 updated Relationships
CWE Content Team MITRE 2023-01-31 +00:00 updated Description, 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, Relationships
CWE Content Team MITRE 2024-11-19 +00:00 updated References
CWE Content Team MITRE 2025-12-11 +00:00 updated Common_Consequences, Relationships, Weakness_Ordinalities
Die auf CVE Find präsentierten Informationen stammen aus mehreren sorgfältig ausgewählten Referenzquellen. CVE-Daten werden von der MITRE Corporation und der National Vulnerability Database (NVD) bereitgestellt. Der Katalog bekannter ausgenutzter Schwachstellen (KEV) stammt von der Cybersecurity and Infrastructure Security Agency (CISA), während EPSS-Scores von FIRST.org kommen. Darüber hinaus werden Daten zu Software-Schwachstellen (CWE) und häufigen Angriffsmustern (CAPEC) von der MITRE Corporation gepflegt, und Informationen zu Hardware- und Software-Konfigurationen (CPE) werden von der NVD bereitgestellt.