#VU70932 Use-after-free in Windows and Windows Server - CVE-2023-21546
Published: January 10, 2023
Vulnerability identifier: #VU70932
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-21546
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Windows Layer 2 Tunneling Protocol (L2TP) implementation. A remote attacker can send specially crafted packets to the RAS server, trigger a use-after-free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of the vulnerable system.
Remediation
Install updates from vendor's website.