CVE-2023-21674
Exploited in the wild. In CISA KEV since 2023‑01‑10. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2023-01-10.
US federal agencies must remediate by 2023-01-31.
Apply updates per vendor instructions.
- Public exploits
1 source with a proof of concept or module.
Exploit links, PoCs and Metasploit modules after sign-in- EPSS
41% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
The patch came 127 days before any public exploit.
- OpenVAS check added
- Public exploit / PoCsource: github-poc
- Patch availablerecord updated
- Added to CISA KEVpublished, weakness classified, att&ck mapped
Affected products
- Windows 8.1Operating Systems / windows
- Windows Server 2012 R2 (Server Core installation)Operating Systems / windows
- Windows 10 Version 1809Operating Systems / windows
- Windows Server 2016 (Server Core installation)Operating Systems / windows
- Windows RT 8.1Operating Systems / windows
- Windows Server 2019 (Server Core installation)Operating Systems / windows
- Windows Server 2022 (Server Core installation)Operating Systems / windows
- Windows 11 version 21H2Operating Systems / windows
And 39 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Scored 8.8 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
References in the record
- msrc.microsoft.com/update-guide/vulnerability/CVE-2022-44680
- cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
- github.com/MzHmO/Exploit-Street/tree/main/2023/CVE-2023-21674
And 2 more references. See all after sign-in
In the news
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