Microsoft Windows Privilege Escalation Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-28
• Known to be used in ransomware campaigns
• EPSS: 19% chance of exploitation in the next 30 days (higher than 97% of CVEs)

[ Description ]Official description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC), aka "Windows ALPC Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

CISA: An elevation of privilege vulnerability exists when Windows improperly handles calls to Advanced Local Procedure Call (ALPC).

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 18 Apr 2022): Apply updates per vendor instructions.

• Patch on blog.0patch.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on portal.msrc.microsoft.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• www.securityfocus.com/bid/105153Third Party AdvisoryVDB Entry
• www.securitytracker.com/id/1041578Third Party AdvisoryVDB Entry
• blog.0patch.com/2018/08/how-we-micropatched-publicly-dropped.htmlExploitPatchThird Party Advisory
• blog.0patch.com/2018/09/comparing-our-micropatch-with.htmlThird Party Advisory
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8440PatchVendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource