SRC-2020-0029 : Microsoft SharePoint Server DataFormParameter ParameterBinding Elevation of Privilege Vulnerability
CVE ID: CVE-2020-17089
CVSS Score: 7.1, (/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C)
Affected Vendors: Microsoft
Affected Products: SharePoint Server
This vulnerability allows remote attackers escalate privileges on affected installations of Microsoft SharePoint Server when form based authentication is enabled. Authentication is required to exploit this vulnerability.
The specific flaw exists within the Evaluate function inside of the DataFormParameter class. The issue results from the lack of proper validation on user-supplied properties when performing databinding. An attacker can leverage this vulnerability to escalate privileges to an administrative account.
Microsoft has issued an update to correct this vulnerability. More details can be found at: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17089
2020-07-14 – Sent to Microsoft
2020-09-08 – Coordinated public release of advisory
Credit: This vulnerability was discovered by Steven Seeley (mr_me) of Qihoo 360 Vulcan Team and Yuhao Weng (@cjm00nw)