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CWE-172 (编码错误) — Vulnerability Class 6

6 vulnerabilities classified as CWE-172 (编码错误). AI Chinese analysis included.

CWE-172 represents an encoding error weakness where software fails to correctly encode or decode data, leading to unexpected values that disrupt intended processing. This flaw is typically exploited when attackers manipulate input data to bypass security controls or trigger unintended application behaviors, such as injection attacks or logic errors, by exploiting the mismatch between expected and actual data formats. Developers can avoid this vulnerability by implementing robust input validation and ensuring consistent encoding standards throughout the data lifecycle. Utilizing established libraries for encoding and decoding operations, rather than custom implementations, helps prevent manual errors. Additionally, thorough testing with diverse input scenarios and adhering to strict data type definitions ensures that all data is processed correctly, maintaining integrity and preventing exploitation through malformed or incorrectly encoded information.

MITRE CWE Description
The product does not properly encode or decode the data, resulting in unexpected values.
Common Consequences (1)
IntegrityUnexpected State
Mitigations (3)
ImplementationAssume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range…
ImplementationWhile it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments. The most conservative approach is to escape or filter all characters that do not pass an extremely strict allowlist (such as everything that is not alphanumeric or whit…
ImplementationInputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

Vulnerabilities classified as CWE-172 (编码错误) represent 6 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.