CVE-2023-21674highunder attackCWE-416

CVE-2023-21674: high-severity vulnerability in Microsoft Windows 10 Version 1507

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

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85Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 34%
from disclosure to weapon422 days
Published on NVDJan 10
1st PoC+422d
CISA KEVJan 10
Action required by CISAfederal deadline: 2023-01-31

Apply updates per vendor instructions.

In short

A flaw in Windows ALPC (Advanced Local Procedure Call) allows a local attacker to run code with higher privileges than their account normally permits. This is dangerous because an attacker with basic user access could gain system-level control.

Technical detail

This use-after-free vulnerability in the Windows ALPC mechanism permits local privilege escalation when an attacker exploits improper memory handling. The attack requires local code execution capability and results in elevated privileges sufficient for system compromise.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
Affected products
Microsoft · Windows 10 Version 1507Microsoft · Windows 10 Version 1607Microsoft · Windows 10 Version 1809Microsoft · Windows 10 Version 20H2Microsoft · Windows 10 Version 21H2Microsoft · Windows 10 Version 22H2Microsoft · Windows 11 version 21H2Microsoft · Windows 11 version 22H2Microsoft · Windows 8.1Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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