PT-2023-1163 · Microsoft · Windows Ancillary Function Driver For Winsock+1

Published 2023-01-10 · Updated 2026-06-13 · CVE-2023-21768

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Ancillary Function Driver for WinSock (affected versions not specified)

Description An elevation of privilege issue exists in the afd.sys driver. The flaw is related to access control deficiencies and an arbitrary write primitive, which allows an attacker to increase their privilege level on the system.

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

Exploit

LPE

Untrusted Pointer Dereference

Weakness Enumeration

CWE-264

CWE-822

Related Identifiers

BDU:2023-00377

CVE-2023-21768

Affected Products

Windows

Windows Ancillary Function Driver For Winsock

References · 43

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/cve_2023_21768_afd_lpe.rb · Exploit
• 🔥 https://github.com/MzHmO/Exploit-Street/tree/main/2023/CVE-2023-21768 · Exploit
• 🔥 https://github.com/chompie1337/Windows_LPE_AFD_CVE-2023-21768 · Exploit
• 🔥 https://github.com/SamuelTulach/nullmap · Exploit
• 🔥 https://github.com/Malwareman007/CVE-2023-21768 · Exploit
• 🔥 https://github.com/cl4ym0re/cve-2023-21768-compiled · Exploit
• 🔥 https://github.com/3yujw7njai/CVE-2023-21768-POC · Exploit
• 🔥 https://github.com/CKevens/CVE-2023-21768-POC · Exploit
• 🔥 https://github.com/zoemurmure/CVE-2023-21768-AFD-for-WinSock-EoP-exploit · Exploit
• 🔥 https://github.com/xboxoneresearch/CVE-2023-21768-dotnet · Exploit
• 🔥 https://github.com/HKxiaoli/Windows_AFD_LPE_CVE-2023-21768 · Exploit
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-21768 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-21768 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-21768 · Security Note
• https://bdu.fstec.ru/vul/2023-00377 · Security Note