Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2023-21546
CVE-2023-21546:
vulnerability analysis and mitigation
Overview
Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability (CVE-2023-21546) was disclosed in January 2023. This vulnerability is one of five critical L2TP-related vulnerabilities (alongside CVE-2023-21543, CVE-2023-21555, CVE-2023-21556, and CVE-2023-21679) affecting various versions of Microsoft Windows operating systems (NVD, Talos).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 8.1 (HIGH), with a vector string of CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. It is associated with two Common Weakness Enumerations (CWE): CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization) and CWE-591 (Sensitive Data Storage in Improperly Locked Memory) (NVD).
Impact
A successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code on Remote Access Service (RAS) servers. The vulnerability affects multiple versions of Windows, including Windows 10, Windows 11, Windows Server 2008, 2012, 2016, 2019, and 2022 (NVD, Talos).
Mitigation and workarounds
Microsoft has released security updates to address this vulnerability as part of their January 2023 Patch Tuesday updates. Organizations are advised to apply the security updates to affected systems (MSRC).
Additional resources
Source: This report was generated using AI
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