[ CVE-2018-8453 · Published 10 Oct 2018 ]
Microsoft Win32k Privilege Escalation Vulnerability
Exploited · CISA KEV CVSS 7.8
EPSS 70%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-01-21
- Known to be used in ransomware campaigns
- EPSS: 70% chance of exploitation in the next 30 days (higher than 99% of CVEs)
[ Description ]Official description
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
CISA: Microsoft Windows Win32k contains a vulnerability that allows an attacker to escalate privileges.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 21 Jul 2022): Apply updates per vendor instructions.
- Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- packetstormsecurity.com/files/153669/Microsoft-Windows-NtUserSetWindowFNID-Win32k-User-…ExploitThird Party AdvisoryVDB Entry
- www.securityfocus.com/bid/105467Broken LinkThird Party AdvisoryVDB Entry
- www.securitytracker.com/id/1041828Broken LinkThird Party AdvisoryVDB Entry
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8453PatchVendor Advisory
- securelist.com/cve-2018-8453-used-in-targeted-attackExploitTechnical DescriptionThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource