SB2021081118 - Privilege escalation in Windows Print Spooler service

Description

This security bulletin contains information about 1 vulnerability.

1) Incorrect permission assignment for critical resource (CVE-ID: CVE-2021-36958)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

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:P/U:Green

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

The vulnerability exists in Windows Print Spooler service due to improperly performed privileged file operations. A local user can send a specially crafted request to the Print Spooler service and execute arbitrary code with SYSTEM privileges.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36958
• https://twitter.com/gentilkiwi/status/1416429860566847490