Microsoft Windows Installer Privilege Escalation Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-03
• 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

Windows Installer Elevation of Privilege Vulnerability

CISA: Microsoft Windows Installer contains an unspecified vulnerability that allows for privilege escalation.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 17 Mar 2022): Apply updates per vendor instructions.

• Patch on msrc.microsoft.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

• msrc.microsoft.com/update-guide/vulnerability/CVE-2021-41379PatchVendor Advisory
• portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41379PatchVendor Advisory
• www.zerodayinitiative.com/advisories/ZDI-21-1308Third Party AdvisoryVDB Entry
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource