Buffer overflow in Microsoft products - CVE-2020-1025

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Main Vulnerability Database Vulnerabilities #VU29729

Buffer overflow in Microsoft products - CVE-2020-1025

Published: July 14, 2020 / Updated: July 15, 2020


Vulnerability identifier: #VU29729
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2020-1025
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Skype for Business Server
Microsoft Lync
Microsoft SharePoint Server

Detailed vulnerability description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation. A local user can modify the token, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


How to mitigate CVE-2020-1025

Install update from vendor's website.

Sources