Input validation error in Microsoft SharePoint Server - CVE-2020-1102

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in Microsoft SharePoint when handling shared forms. A remote authenticated attacker can invoke a shared form in a way that allows arbitrary controls to be instantiated and execute arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.

How to mitigate CVE-2020-1102

Sources

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1102
• https://www.zerodayinitiative.com/advisories/ZDI-20-648/