Tag Archives: Improper Verification of Source of a Communication Channel

CWE-940 – Improper Verification of Source of a Communication Channel

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Description

The software 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.

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.

Modes of Introduction:

– Architecture and Design

Likelihood of Exploit:

 

Related Weaknesses

CWE-923

 

Consequences

Access Control, Other: Gain Privileges or Assume Identity, Varies by Context

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

 

Potential Mitigations

Phase: Architecture and Design

Effectiveness:

Description: 

CVE References

 

  • 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