Advisory Details

July 16th, 2020

Microsoft SharePoint Scorecards Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI-20-874
ZDI-CAN-10963

CVE ID CVE-2020-1439
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 Server. Authentication is required to exploit this vulnerability.

The specific flaw exists within the handling of controls in the Microsoft.PerformancePoint.Scorecards.Client module. Instantiating the ExcelDataSet control can trigger the deserialization of untrusted data. 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-2020-1439
DISCLOSURE TIMELINE
  • 2020-05-07 - Vulnerability reported to vendor
  • 2020-07-16 - Coordinated public release of advisory
CREDIT Anonymous
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