CVE-2012-3527

view_help.php in the backend help system in TYPO3 4.5.x before 4.5.19, 4.6.x before 4.6.12 and 4.7.x before 4.7.4 allows remote authenticated backend users to unserialize arbitrary objects and possibly execute arbitrary PHP code via an unspecified parameter, related to a missing signature (HMAC).

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://osvdb.org/84773
• http://secunia.com/advisories/50287
• http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2012-004/
• http://www.debian.org/security/2012/dsa-2537
• http://www.openwall.com/lists/oss-security/2012/08/22/8
• https://exchange.xforce.ibmcloud.com/vulnerabilities/77791
• http://osvdb.org/84773
• http://secunia.com/advisories/50287
• http://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2012-004/
• http://www.debian.org/security/2012/dsa-2537
• http://www.openwall.com/lists/oss-security/2012/08/22/8
• https://exchange.xforce.ibmcloud.com/vulnerabilities/77791