SI-10 Information Input Validation
Description
Checking the valid syntax and semantics of information system inputs (e.g., character set, length, numerical range, and acceptable values) verifies that inputs match specified definitions for format and content. Software applications typically follow well-defined protocols that use structured messages (i.e., commands or queries) to communicate between software modules or system components. Structured messages can contain raw or unstructured data interspersed with metadata or control information. If software applications use attacker-supplied inputs to construct structured messages without properly encoding such messages, then the attacker could insert malicious commands or special characters that can cause the data to be interpreted as control information or metadata. Consequently, the module or component that receives the tainted output will perform the wrong operations or otherwise interpret the data incorrectly. Prescreening inputs prior to passing to interpreters prevents the content from being unintentionally interpreted as commands. Input validation helps to ensure accurate and correct inputs and prevent attacks such as cross-site scripting and a variety of injection attacks.
Applicability
This Control applies to all TAMU-CC information resources.
The intended audience for this Control includes all information resource owners, custodians, and users of information resources.
Implementation
TAMU-CC shall check the validity of information inputs in automated systems.
Revision History
Last Updated: February 21, 2025
Previous Versions:
- June 29, 2023
- May 31, 2022
- March 25, 2021
- September 16, 2019