+SI-10 [M] Information Input Validation
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SI-10 [M] Information Input Validation
Control
Check the validity of the following information inputs: [Assignement: information inputs].
Discussion
Checking the valid syntax and semantics of system inputs—including character set, length, numerical range, and acceptable values—verifies that inputs match specified definitions for format and content. For example, if the organization specifies that numerical values between 1-100 are the only acceptable inputs for a field in a given application, inputs of "387," "abc," or "%K%" are invalid inputs and are not accepted as input to the system. Valid inputs are likely to vary from field to field within a software application. 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 corrupted output will perform the wrong operations or otherwise interpret the data incorrectly. Prescreening inputs prior to passing them to interpreters prevents the content from being unintentionally interpreted as commands. Input validation ensures accurate and correct inputs and prevents attacks such as cross-site scripting and a variety of injection attacks.
Assessment Objective
the validity of the [Assignement: information inputs] is checked.
Assessment Method
Examine
System and information integrity policy
system and information integrity procedures
access control policy and procedures
separation of duties policy and procedures
procedures addressing information input validation
documentation for automated tools and applications to verify the validity of information
list of information inputs requiring validity checks
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
Organizational personnel responsible for information input validation
organizational personnel with information security responsibilities
system/network administrators
system developer
1. Přehled
1.1 Odkazy
1.2 Identifikované požadavky
1.3 Související regulace
2. Identifikované požadavky
Požadavky
| Zdroj |
Požadavek |
3. Související regulace
Propojené úkoly
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