SYSTEM privilege escalation via named-pipe client impersonation
Published Feb 9, 2022 · Updated Sep 16, 2024
Local privilege escalation in affected ESET products for Windows allows local users to execute arbitrary code as NT AUTHORITY\SYSTEM. The AMSI scanning feature permits an untrusted process to impersonate a named-pipe client, causing privileged operations to run under attacker control. Exploitation requires local low-privileged code execution and SeImpersonatePrivilege, which defaults to Administrators and Local Service accounts.
Summary
What happened
Local privilege escalation in affected ESET products for Windows allows local users to execute arbitrary code as NT AUTHORITY\SYSTEM. The AMSI scanning feature permits an untrusted process to impersonate a named-pipe client, causing privileged operations to run under attacker control. Exploitation requires local low-privileged code execution and SeImpersonatePrivilege, which defaults to Administrators and Local Service accounts.
The record
- CVE
- CVE-2021-37852
- Published
- Feb 9, 2022
- Updated
- Sep 16, 2024
- Vendor
- ESET
- Product
- ESET Mail Security for Microsoft Exchange Server
- Classifications
- CWE-269, T1134.001
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 9, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=7.0.10019 <=8.0.10016.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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