Microsoft Windows AppX Deployment Extensions Privilege Escalation Vulnerability
An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)23 May 2022
- Exploited in EUVD (ENISA)23 May 2022
- Used by ransomwareyes
- EPSS above 10 %3.6%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply updates per vendor instructions.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
An elevation of privilege vulnerability exists when the Windows AppX Deployment Extensions improperly performs privilege management, resulting in access to system files.To exploit this vulnerability, an authenticated attacker would need to run a specially crafted application to elevate privileges.The security update addresses the vulnerability by correcting how AppX Deployment Extensions manages privileges., aka 'Windows AppX Deployment Extensions Elevation of Privilege Vulnerability'.
Affected products
- 2019 (Core installation)
- 10 Version 1809 for ARM64-based Systems
- 10 Version 1803 for ARM64-based Systems
- 10 Version 1809 for 32-bit Systems
- 10 Version 1809 for x64-based Systems
- unspecified
- 10 Version 1803 for x64-based Systems
- 10 Version 1803 for 32-bit Systems
- 10 Version 1709 for ARM64-based Systems
- 10 Version 1709 for 32-bit Systems
- version 1803 (Core Installation)
- 2019
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
References
Other exploited vulnerabilities from the same vendor
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