PT-2021-1926 · Microsoft · Windows Kernel+1

James Forshaw · Published 2021-02-09 · Updated 2023-12-29 · CVE-2021-24096

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 Kernel versions prior to the fixed version

Description The issue is related to an elevation-of-privilege vulnerability in the Windows Kernel, which can be exploited due to a lack of protection for system data. This vulnerability allows an attacker to elevate their privileges. The vulnerability is related to the handling of trusted hive registry key symbolic links when a process is running in a server silo, which can lead to elevation of privilege.

Recommendations For Windows Kernel versions prior to the fixed version, update to the latest version to resolve the issue. As a temporary workaround, consider restricting access to sensitive system data and registry keys to minimize the risk of exploitation.

Exploit

Fix

LPE

Improper Privilege Management

Weakness Enumeration

CWE-269

CWE-264

Related Identifiers

BDU:2021-00729

CVE-2021-24096

Affected Products

Windows

Windows Kernel

References · 12

• 🔥 https://github.com/FunPhishing/CVE-2021-24096 · Exploit
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24096 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00729 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-24096 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-24096 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-24096 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24096 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-24096 · Vendor Advisory
• https://t.me/cibsecurity/24167 · Telegram Post
• https://t.me/cybersecuritytechnologies/3038 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021020933 · Note
• https://t.me/cybersecuritytechnologies/2684 · Telegram Post