Home > CAPEC List > CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content (Version 3.0)  

CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content

Attack Pattern ID: 477
Abstraction: Detailed
Status: Draft
Presentation Filter:
+ Description
An attacker exploits the underlying complexity of a data structure that allows for both signed and unsigned content, to cause unsigned data to be processed as though it were signed data.
+ Likelihood Of Attack

Low

+ Typical Severity

High

+ Relationships

The table(s) below shows the other attack patterns and high level categories that are related to this attack pattern. These relationships are defined as ChildOf, ParentOf, MemberOf and give insight to similar items that may exist at higher and lower levels of abstraction. In addition, relationships such as CanFollow, PeerOf, and CanAlsoBe are defined to show similar attack patterns that the user may want to explore.

+ Relevant to the view "Mechanisms of Attack" (CAPEC-1000)
NatureTypeIDName
ChildOfStandard Attack PatternStandard Attack Pattern - A standard level attack pattern in CAPEC is focused on a specific methodology or technique used in an attack. It is often seen as a singular piece of a fully executed attack. A standard attack pattern is meant to provide sufficient details to understand the specific technique and how it attempts to accomplish a desired goal. A standard level attack pattern is a specific type of a more abstract meta level attack pattern.473Signature Spoof
+ Prerequisites
Signer and recipient are using complex data storage structures that allow for a mix between signed and unsigned data
Recipient is using signature verification software that does not maintain separation between signed and unsigned data once the signature has been verified.
+ Skills Required
[Level: High]
The attacker may need to continuously monitor a stream of signed data, waiting for an exploitable message to appear.
[Level: High]
Attacker must be able to create malformed data blobs and know how to insert them in a location that the recipient will visit.
+ Mitigations
Ensure the application is fully patched and does not allow the processing of unsigned data as if it is signed data.
+ Content History
Submissions
Submission DateSubmitterOrganization
2014-06-23CAPEC Content TeamThe MITRE Corporation

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Page Last Updated or Reviewed: July 31, 2018