Advisory Details

April 15th, 2020

Microsoft SharePoint TypeConverter Deserialization of Untrusted Data Remote Code Execution Vulnerability

ZDI-20-468
ZDI-CAN-10027

CVE ID CVE-2020-0932
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 use of TypeConverter classes. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the SharePoint service at high integrity.

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-2020-0932
DISCLOSURE TIMELINE
  • 2020-02-07 - Vulnerability reported to vendor
  • 2020-04-15 - Coordinated public release of advisory
  • 2020-10-27 - Advisory Updated
CREDIT Anonymous
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