CVE-2021-23420

This affects the package codeception/codeception from 4.0.0 and before 4.1.22, before 3.1.3. The RunProcess class can be leveraged as a gadget to run arbitrary commands on a system that is deserializing user input without validation.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• https://github.com/Codeception/Codeception/blob/4.1/ext/RunProcess.php%23L52
• https://github.com/Codeception/Codeception/pull/6241
• https://github.com/JinYiTong/poc
• https://snyk.io/vuln/SNYK-PHP-CODECEPTIONCODECEPTION-1324585
• https://github.com/Codeception/Codeception/blob/4.1/ext/RunProcess.php%23L52
• https://github.com/Codeception/Codeception/pull/6241
• https://github.com/JinYiTong/poc
• https://snyk.io/vuln/SNYK-PHP-CODECEPTIONCODECEPTION-1324585