CAPEC の説明
An adversary looking to execute a command of their choosing, injects new items into an existing command thus modifying interpretation away from what was intended. Commands in this context are often standalone strings that are interpreted by a downstream component and cause specific responses. This type of attack is possible when untrusted values are used to build these command strings. Weaknesses in input validation or command construction can enable the attack and lead to successful exploitation.
CAPEC の情報
前提条件
The target application must accept input from the user and then use this input in the construction of commands to be executed. In virtually all cases, this is some form of string input that is concatenated to a constant string defined by the application to form the full command to be executed.緩和策
All user-controllable input should be validated and filtered for potentially unwanted characters. Using an allowlist for input is desired, but if use of a denylist approach is necessary, then focusing on command related terms and delimiters is necessary.Input should be encoded prior to use in commands to make sure command related characters are not treated as part of the command. For example, quotation characters may need to be encoded so that the application does not treat the quotation as a delimiter.
Input should be parameterized, or restricted to data sections of a command, thus removing the chance that the input will be treated as part of the command itself.
関連する弱点
| 弱点名 | |
|---|---|
CWE-77 |
Improper Neutralization of Special Elements used in a Command The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. |
参考文献
REF-615
OWASP Web Security Testing Guidehttps://owasp.org/www-project-web-security-testing-guide/latest/4-Web_Application_Security_Testing/07-Input_Validation_Testing/12-Testing_for_Command_Injection.html
登録情報
| 名前 | 組織 | 日付 | リリース日 |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation |
変更履歴
| 名前 | 組織 | 日付 | コメント |
|---|---|---|---|
| CAPEC Content Team | The MITRE Corporation | Updated Attack_Motivation-Consequences, Attack_Prerequisites, Description, Description Summary, Solutions_and_Mitigations | |
| CAPEC Content Team | The MITRE Corporation | Updated Related_Weaknesses, Solutions_and_Mitigations, Typical_Likelihood_of_Exploit, Typical_Severity | |
| CAPEC Content Team | The MITRE Corporation | Updated Mitigations | |
| CAPEC Content Team | The MITRE Corporation | Updated References, Taxonomy_Mappings |
