Advisory Details

May 12th, 2020

Microsoft SharePoint Shared Forms Incomplete Blacklist Remote Code Execution Vulnerability

ZDI-20-648
ZDI-CAN-10124

CVE ID CVE-2020-1102
CVSS SCORE 8.8, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS SharePoint
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft SharePoint. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of shared forms. It is possible to invoke a shared form in a way that allows arbitrary controls to be instantiated. An attacker can leverage this vulnerability to execute code in the context of the SharePoint web server process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1102
DISCLOSURE TIMELINE
  • 2020-01-21 - Vulnerability reported to vendor
  • 2020-05-12 - Coordinated public release of advisory
CREDIT Anonymous
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