CVE-2024-23636

SOFARPC is a Java RPC framework. SOFARPC defaults to using the SOFA Hessian protocol to deserialize received data, while the SOFA Hessian protocol uses a blacklist mechanism to restrict deserialization of potentially dangerous classes for security protection. But, prior to version 5.12.0, there is a gadget chain that can bypass the SOFA Hessian blacklist protection mechanism, and this gadget chain only relies on JDK and does not rely on any third-party components. Version 5.12.0 fixed this issue by adding a blacklist. SOFARPC also provides a way to add additional blacklists. Users can add a class like -Drpc_serialize_blacklist_override=org.apache.xpath. to avoid this issue.

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/sofastack/sofa-rpc/commit/42d19b1b1d14a25aafd9ef7c219c04a19f90fc76
• https://github.com/sofastack/sofa-rpc/security/advisories/GHSA-7q8p-9953-pxvr
• https://github.com/sofastack/sofa-rpc/commit/42d19b1b1d14a25aafd9ef7c219c04a19f90fc76
• https://github.com/sofastack/sofa-rpc/security/advisories/GHSA-7q8p-9953-pxvr