CVE-2020-1103: Microsoft SharePoint Information Disclosure Vulnerability

DescriptionCVE.org

An information disclosure vulnerability exists where certain modes of the search function in Microsoft SharePoint Server are vulnerable to cross-site search attacks (a variant of cross-site request forgery, CSRF). When users are simultaneously logged in to Microsoft SharePoint Server and visit a malicious web page, the attacker can, through standard browser functionality, induce the browser to invoke search queries as the logged in user. While the attacker can’t access the search results or documents as such, the attacker can determine whether the query did return results or not, and thus by issuing targeted queries discover facts about documents that are searchable for the logged-in user. The security update addresses the vulnerability by running the search queries in a way that doesn’t expose them to this browser vulnerability.

• Microsoft · Microsoft SharePoint Enterprise Server 2016from 16.0.0 before publication
• Microsoft · Microsoft SharePoint Foundation 2013 Service Pack 1from 15.0.0 before publication
• Microsoft · Microsoft SharePoint Server 2019from 16.0.0 before publication

Exploitation

Possible (1 to 10%). EPSS between 1% and 10%.

CISA KEV

Not listed

Public check

No public nuclei template

Weakness

Cross-Site Request Forgery

Vendor

Microsoft

Published

May 2020

Band

Possible (1 to 10%), May 2020

• NVD entrynvd.nist.gov
• CVE recordcve.org
• Weakness CWE-352cwe.mitre.org
• Vendor advisorymsrc.microsoft.com
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2portal.msrc.microsoft.com