CVE Vulnerabilities

CVE-2023-36903

Improper Link Resolution Before File Access ('Link Following')

Published: Aug 08, 2023 | Modified: Nov 21, 2024
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

Windows System Assessment Tool Elevation of Privilege Vulnerability

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Windows_10 Microsoft * 10.0.10240.20107 (excluding)
Windows_10_1607 Microsoft * 10.0.14393.6167 (excluding)
Windows_10_1809 Microsoft * 10.0.17763.4737 (excluding)
Windows_10_21h2 Microsoft * 10.0.19044.3324 (excluding)
Windows_10_22h2 Microsoft * 10.0.19045.3324 (excluding)
Windows_11_21h2 Microsoft * 10.0.22000.2295 (excluding)
Windows_11_22h2 Microsoft * 10.0.22621.2134 (excluding)
Windows_server_2008 Microsoft r2-sp1 (including) r2-sp1 (including)
Windows_server_2012 Microsoft - (including) - (including)
Windows_server_2012 Microsoft r2 (including) r2 (including)
Windows_server_2016 Microsoft - (including) - (including)
Windows_server_2019 Microsoft - (including) - (including)
Windows_server_2022 Microsoft - (including) - (including)

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References