SYSTEM privilege escalation via CollectionSession data race
Published Jan 12, 2021 · Updated Oct 8, 2024
A data race in Diagnostics Hub Standard Collector allows local users to elevate privileges from a standard account to SYSTEM. Concurrent COM calls against the CollectionSession object access shared state without adequate synchronization, allowing corruption in its privileged service process. A low-privileged local session and access to the exposed COM interface are required; successful exploitation executes code as SYSTEM.
Summary
What happened
A data race in Diagnostics Hub Standard Collector allows local users to elevate privileges from a standard account to SYSTEM. Concurrent COM calls against the CollectionSession object access shared state without adequate synchronization, allowing corruption in its privileged service process. A low-privileged local session and access to the exposed COM interface are required; successful exploitation executes code as SYSTEM.
The record
- CVE
- CVE-2021-1680
- Published
- Jan 12, 2021
- Updated
- Oct 8, 2024
- Vendor
- Microsoft
- Product
- Microsoft Visual Studio 2019
- Classifications
- CWE-269, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 12, 2021CVE publishedPublication date reported by the CVE source.
- Oct 8, 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=16.0.0 <publication
- Affected versionversion=16.0 <publication
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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.
Weakness, pattern, technique
Public exploit references
- COMRACE proof-of-concept exploitationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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