SB2022091357 - Privilege escalation in Microsoft Windows Group Policy

Description

This security bulletin contains information about 1 vulnerability.

1) Link following (CVE-ID: CVE-2022-37955)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: 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:U/U:Clear

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

The vulnerability exists due to a symlink following issue within the Group Policy Preference Client module. A local user can create a specially crafted symbolic link to a critical file on the system and overwrite it with SYSTEM privileges.

Successful exploitation of this vulnerability may result in privilege escalation.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-37955
• https://www.zerodayinitiative.com/advisories/ZDI-22-1285/