COMMON WEAKNESS ENUMERATIONDraft

CWE-353

Missing Support for Integrity Check

The product uses a transmission protocol that does not include a mechanism for verifying the integrity of the data during transmission, such as a checksum.

Abstraction

Base

Structure

Simple

Likelihood of Exploit

Medium

Understand the problem

What is the problem?

The product uses a transmission protocol that does not include a mechanism for verifying the integrity of the data during transmission, such as a checksum.

Extended description

If integrity check values or "checksums" are omitted from a protocol, there is no way of determining if data has been corrupted in transmission. The lack of checksum functionality in a protocol removes the first application-level check of data that can be used. The end-to-end philosophy of checks states that integrity checks should be performed at the lowest level that they can be completely implemented. Excluding further sanity checks and input validation performed by applications, the protocol's checksum is the most important level of checksum, since it can be performed more completely than at any previous level and takes into account entire messages, as opposed to single packets.

Root cause

How and when does the problem arise?

Lifecycle phase

Architecture and Design

OMISSION: This weakness is caused by missing a security tactic during the architecture and design phase.

Lifecycle phase

Implementation

Risk

What does successful exploitation lead to?

Other

Affected security scopes: Integrity, Other

Data that is parsed and used may be corrupted.
Hide ActivitiesOther

Affected security scopes: Non-Repudiation, Other

Without a checksum it is impossible to determine if any changes have been made to the data after it was sent.

Defence

How is it prevented and fixed?

Architecture and Design

Architecture and design approach

Detail
Add an appropriately sized checksum to the protocol, ensuring that data received may be simply validated before it is parsed and used.

Implementation

Implementation-phase defence

Detail
Ensure that the checksums present in the protocol design are properly implemented and added to each message before it is sent.
CWE-353: Common Weakness Enumeration Entry CWE-353 · DayBreach Sözlük · DayBreach