cbcvebase.
CVE-2020-1210
published 2020-09-11

CVE-2020-1210: A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker…

PriorityP183high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
ITWVulnCheck KEVRansomware
Exploited in the wild
EPSS
1.76%
75.5th percentile
A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account. Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint. The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.

Affected

15 ranges
VendorProductVersion rangeFixed in
microsoftmicrosoft_business_productivity_servers_2010_service_pack_2>= 13.0.0.0 < publicationpublication
microsoftmicrosoft_sharepoint_enterprise_server_2013_service_pack_1>= 15.0.0 < publicationpublication
microsoftmicrosoft_sharepoint_enterprise_server_2016>= 16.0.0 < publicationpublication
microsoftmicrosoft_sharepoint_server_2010_service_pack_2>= 13.0.0.0 < publicationpublication
microsoftmicrosoft_sharepoint_server_2019>= 16.0.0 < publicationpublication
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_server_2010_service_pack_2
msrcmicrosoft_sharepoint_server_2019

Detection & IOCsextracted from sources · hover to see the quote

  • Attack vector is uploading a specially crafted SharePoint application package to a vulnerable SharePoint site; monitor for suspicious .app/.wsp package uploads to SharePoint
  • Successful exploitation results in code execution under the SharePoint application pool identity and SharePoint server farm account; monitor for anomalous process spawning from SharePoint worker processes (w3wp.exe)
  • Ransomware actors have historically targeted SharePoint vulnerabilities; prioritize detection of lateral movement and ransomware staging activity following any SharePoint compromise
  • The Preview Pane is NOT an attack vector; focus detection on upload/import endpoints rather than document preview activity
  • ·Vulnerability root cause is failure to check source markup of an application package; detection logic should focus on malformed or unexpected markup within uploaded SharePoint app packages

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
vulncheck9.9CRITICAL
vendor_msrc9.9CRITICAL
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