CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Description

Common consequences· 1

• Confidentiality / Integrity / Availability / Other — Execute Unauthorized Code or Commands, Alter Execution Logic, Read Application Data, Modify Application Data
  An attacker could include arguments that allow unintended commands or code to be executed, allow sensitive data to be read or modified or could cause other unintended behavior.

Potential mitigations· 5

• [Implementation]Where possible, avoid building a single string that contains the command and its arguments. Some languages or frameworks have functions that support specifying independent arguments, e.g. as an array, which is used to automatically perform the appropriate quoting or escaping while building the command. For example, in PHP, escapeshellarg() can be used to escape a single argument to system(), or exec() can be called with an array of arguments. In C, code can often be refactored from using system() - which accepts a single string - to using exec(), which requires separate function arguments for each parameter.
• [Architecture and Design]Understand all the potential areas where untrusted inputs can enter your product: parameters or arguments, cookies, anything read from the network, environment variables, request headers as well as content, URL components, e-mail, files, databases, and any external systems that provide data to the application. Perform input validation at well-defined interfaces.
• [Implementation]
• [Implementation]Directly convert your input type into the expected data type, such as using a conversion function that translates a string into a number. After converting to the expected data type, ensure that the input's values fall within the expected range of allowable values and that multi-field consistencies are maintained.
• [Implementation]

Related CAPEC attack patterns· 5

Exploits (incoming)5

(incoming)44

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Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.