CWE-624 — Executable Regular Expression Error
CWE-624: Executable Regular Expression Error
MITRE CWE weakness
| Kind | Weakness |
| Abstraction | Base |
| Status | Incomplete |
| Likelihood of exploit | — |
Description
The product uses a regular expression that either (1) contains an executable component with user-controlled inputs, or (2) allows a user to enable execution by inserting pattern modifiers.
Case (2) is possible in the PHP preg_replace() function, and possibly in other languages when a user-controlled input is inserted into a string that is later parsed as a regular expression.
Common consequences
- Confidentiality, Integrity, Availability: Execute Unauthorized Code or Commands
Mitigations
Implementation — The regular expression feature in some languages allows inputs to be quoted or escaped before insertion, such as \Q and \E in Perl.
References
- CWE page: https://cwe.mitre.org/data/definitions/624.html
- CWE list: https://cwe.mitre.org/data/index.html