CVE-2018-8639: Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639 ; https://nvd.nist.gov/vuln/detail/CVE-2018-8639

Weakness behind it

CISA records this vulnerability as an instance of CWE-404. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-8639
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog