PT-2023-1022 · Microsoft · Windows

Yuki Chen · Published 2023-01-10 · Updated 2024-05-29 · CVE-2023-21546

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows versions prior to the fixed version

Description The issue is related to the implementation of the Layer 2 Tunneling Protocol (L2TP) in Microsoft Windows, specifically involving the use of memory after it has been freed. This can be exploited by a remote attacker who sends a specially crafted connection request to a RAS server, potentially allowing the execution of arbitrary code. The vulnerability enables remote attackers to execute arbitrary code and impact the system.

Recommendations For Windows versions prior to the fixed version, apply the necessary patch or update to resolve the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Race Condition

Use After Free

Weakness Enumeration

CWE-591

CWE-362

CWE-416

Related Identifiers

BDU:2023-00113

CVE-2023-21546

Affected Products

Windows

References · 14

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21546 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00113 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21546 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-21546 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/688435 · Security Note
• https://osv.dev/vulnerability/CVE-2023-21546 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-21546 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/688799 · Security Note
• https://t.me/cvenotify/41761 · Telegram Post
• https://t.me/cvenotify/41760 · Telegram Post
• https://t.me/cibsecurity/56308 · Telegram Post
• https://t.me/cvenotify/42247 · Telegram Post
• https://t.me/cvenotify/81299 · Telegram Post
• https://t.me/cibsecurity/56292 · Telegram Post