CVE-2016-6620

An issue was discovered in phpMyAdmin. Some data is passed to the PHP unserialize() function without verification that its valid serialized data. The unserialization can result in code execution because of the interaction with object instantiation and autoloading. All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 4.4.15.8), and 4.0.x versions (prior to 4.0.10.17) are affected.

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

• http://www.securityfocus.com/bid/95055
• https://lists.debian.org/debian-lts-announce/2018/07/msg00006.html
• https://security.gentoo.org/glsa/201701-32
• https://www.phpmyadmin.net/security/PMASA-2016-43
• http://www.securityfocus.com/bid/95055
• https://lists.debian.org/debian-lts-announce/2018/07/msg00006.html
• https://security.gentoo.org/glsa/201701-32
• https://www.phpmyadmin.net/security/PMASA-2016-43