PT-2023-1024 · Microsoft · Windows Secure Socket Tunneling Protocol+1

Yuki Chen · Published 2023-01-10 · Updated 2024-05-29 · CVE-2023-21535

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 Secure Socket Tunneling Protocol (SSTP) (affected versions not specified)

Description The issue is related to errors in synchronization when using a shared resource in the implementation of the Secure Socket Tunneling Protocol (SSTP) in Microsoft Windows. This can be exploited by sending a specially crafted connection request to a RAS server, allowing a remote attacker to execute arbitrary code.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Race Condition

Weakness Enumeration

CWE-591

CWE-362

Related Identifiers

BDU:2023-00115

CVE-2023-21535

Affected Products

Windows

Windows Secure Socket Tunneling Protocol

References · 10

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-21535 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21535 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-00115 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-21535 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21535 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/688430 · Security Note
• https://osv.dev/vulnerability/CVE-2023-21535 · Vendor Advisory
• https://t.me/cvenotify/41769 · Telegram Post
• https://t.me/cvenotify/81291 · Telegram Post
• https://t.me/cibsecurity/56278 · Telegram Post