CVE-2020-1147

A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka ‘.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability’.

Recent assessments:

zeroSteiner at July 27, 2020 10:19pm UTC reported:

A deserialization vulnerability exists within Microsoft Sharepoint that could allow an attacker to execute code on the server within the context of the service account. The attacker would need to authenticate to Sharepoint and submit a specially crafted POST request to a specific resource that implements the ContactLinksSuggestionsMicroView or InputFormContactLinksSuggestionsMicroView control. The following two resources meet this requirement:

• /_layouts/15/quicklinks.aspx?Mode=Suggestion

• /_layouts/15/quicklinksdialogform.aspx?Mode=Suggestion

Alternatively, an attacker with the correct privileges may create a page which implements this.

For more information, see the details analysis posted to srcincite.io by Steven Seeley.

Assessed Attacker Value: 4
Assessed Attacker Value: 4Assessed Attacker Value: 4