cbcvebase.
CVE-2020-0971
published 2020-04-15

CVE-2020-0971: A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka…

PriorityP259high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
13.18%
95.9th 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-2020-0931, CVE-2020-0932, CVE-2020-0974.

Affected

12 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_sharepoint_enterprise_server_2016
msrcmicrosoft_sharepoint_foundation_2010_service_pack_2
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 application package uploads.
  • The vulnerability is triggered by failure to validate source markup of an application package; inspect SharePoint app package contents for malicious markup.
  • Successful exploitation results in arbitrary code execution in the context of the SharePoint application pool and farm account; monitor those process contexts for anomalous activity.
  • The Preview Pane is NOT an attack vector; focus detection on the application package upload workflow rather than document preview activity.
  • ·Exploit status is publicly disclosed: No and exploited: No at time of advisory; exploitation rated 'Less Likely' for both latest and older software releases.

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_msrc8.8HIGH
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