4.6

CVE-2021-40449

Warnung
Exploit

Win32k Elevation of Privilege Vulnerability

Win32k Elevation of Privilege Vulnerability
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Windows 10 1507 Version < 10.0.10240.19086
Microsoft ≫ Windows 10 1607 Version < 10.0.14393.4704
Microsoft ≫ Windows 10 1809 Version < 10.0.17763.2237
Microsoft ≫ Windows 10 1909 Version < 10.0.18363.1854
Microsoft ≫ Windows 10 2004 Version < 10.0.19041.1288
Microsoft ≫ Windows 10 20h2 Version < 10.0.19041.1288
Microsoft ≫ Windows 10 21h1 Version < 10.0.19041.1288
Microsoft ≫ Windows 11 21h2 Version < 10.0.22000.258
Microsoft ≫ Windows 7 Version - Update sp1
Microsoft ≫ Windows 8.1 Version -
Microsoft ≫ Windows Rt 8.1 Version -
Microsoft ≫ Windows Server 2004 Version < 10.0.19041.1288
Microsoft ≫ Windows Server 2008 Version - Update sp2
Microsoft ≫ Windows Server 2008 Version r2 Update sp1 HwPlatform x64
Microsoft ≫ Windows Server 2016 Version < 10.0.14393.4704
Microsoft ≫ Windows Server 2019 Version < 10.0.17763.2237
Microsoft ≫ Windows Server 2022 Version < 10.0.20348.288
Microsoft ≫ Windows Server 20h2 Version < 10.0.19042.1288

17.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Windows Win32k Privilege Escalation Vulnerability

Schwachstelle

Unspecified vulnerability allows for an authenticated user to escalate privileges.

Beschreibung

Apply updates per vendor instructions.

Erforderliche Maßnahmen
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 74.13% 0.994
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 4.6 3.9 6.4
AV:L/AC:L/Au:N/C:P/I:P/A:P
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Microsoft 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

http://packetstormsecurity.com/files/164926/Win32k-NtGdiResetDC-Use-After-Free-Local-Privilege-Escalation.html
Third Party Advisory
Exploit
VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40449
Patch
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40449
US Government Resource