Vulnerability identifier: #VU71588

Vulnerability risk: Critical

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-21712

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the Windows Point-to-Point Tunneling Protocol (PPTP) implementation. A remote non-authenticated attacker can send specially crafted packets to the affected RAS server, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10 2004, 11 - 11 22H2, 8.1 - 8.1 RT

Windows Server: 2012 - 2022 20H2

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21712

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.