CVE-2020-1439

A remote code execution vulnerability exists in PerformancePoint Services for SharePoint Server when the software fails to check the source markup of XML file input, aka PerformancePoint Services Remote Code Execution Vulnerability.

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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1439
• https://www.zerodayinitiative.com/advisories/ZDI-20-874/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1439
• https://www.zerodayinitiative.com/advisories/ZDI-20-874/