PT-2021-2385 · Microsoft · Windows

Marcin Wiazowski · Published 2021-03-09 · Updated 2023-12-29 · CVE-2021-27077

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 (affected versions not specified)

Description The issue is related to insufficient access control in the Win32k component of Windows operating systems. Exploitation of this issue may allow an attacker to elevate their privileges using a specially crafted application. The vulnerability is associated with untrusted pointer dereferences in various functions, including MulStrokeAndFillPath, MulFillPath, MulStretchBlt, MulLineTo, bStretch, MulDrawStream, MulTextOut, MulAlphaBlend, MulGradientFill, MulStrokePath, and MulTransparentBlt. This can potentially affect the system.

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

LPE

Improper Privilege Management

Weakness Enumeration

CWE-269

CWE-264

Related Identifiers

BDU:2021-01626

CVE-2021-27077

ZDI-21-287

ZDI-21-403

ZDI-21-482

ZDI-21-494

ZDI-21-495

ZDI-21-496

ZDI-21-497

ZDI-21-498

ZDI-21-499

ZDI-21-500

ZDI-21-501

Affected Products

Windows

References · 26

• https://zerodayinitiative.com/advisories/ZDI-21-403 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-494 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-287 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-497 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-500 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-498 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-501 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-495 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27077 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-01626 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-499 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-496 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27077 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-482 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27077 · Vendor Advisory