cbcvebase.
CVE-2020-0931
published 2020-04-15

CVE-2020-0931: A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka…

PriorityP258high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
10.70%
95.3th percentile
A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka 'Microsoft SharePoint Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0920, CVE-2020-0929, CVE-2020-0932, CVE-2020-0971, CVE-2020-0974.

Affected

13 ranges
VendorProductVersion rangeFixed in
microsoftbusiness_productivity_servers
microsoftmicrosoft_sharepoint_enterprise_server
microsoftmicrosoft_sharepoint_server
microsoftsharepoint_enterprise_server
microsoftsharepoint_enterprise_server
microsoftsharepoint_foundation
microsoftsharepoint_foundation
microsoftsharepoint_server
msrcmicrosoft_business_productivity_servers_2010_service_pack_2
msrcmicrosoft_sharepoint_enterprise_server_2013_service_pack_1
msrcmicrosoft_sharepoint_enterprise_server_2016
msrcmicrosoft_sharepoint_foundation_2013_service_pack_1
msrcmicrosoft_sharepoint_server_2019

Detection & IOCsextracted from sources · hover to see the quote

  • Attack vector requires a user to upload a specially crafted SharePoint application package to an affected SharePoint instance; monitor for unusual or unauthorized SharePoint app package uploads.
  • Successful exploitation results in arbitrary code execution in the context of the SharePoint application pool and SharePoint server farm account; monitor these process contexts for anomalous child processes or commands.
  • The Preview Pane is NOT an attack vector; focus detection on the file upload/package ingestion pipeline rather than passive document rendering.
  • ·The vulnerability stems from SharePoint failing to validate the source markup of an application package; the fix corrects this markup-checking logic. Detection should focus on the package upload mechanism, not network-level indicators.
  • ·As of the advisory, this CVE had not been publicly disclosed or exploited in the wild, reducing immediate urgency but not eliminating risk.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
vendor_msrc8.8CRITICAL
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