Main Vulnerability Database Vulnerabilities #VU50501

Input validation error in Microsoft Windows and Windows Server - CVE-2021-24093

Published: February 9, 2021 / Updated: March 1, 2021

Vulnerability identifier: #VU50501

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-24093

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

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

The vulnerability exists due to insufficient validation of user-supplied input in Windows Graphics Component. A remote attacker can host a website, trick a victim to open the specially crafted file and execute arbitrary code on the target system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2021-24093

Install updates from vendor's website.

Links to Public Exploits and PoC-codes

Exploit #5186 - Microsoft DirectWrite heap-based buffer overflow in fsg_ExecuteGlyph while processing variable TTF fonts (March 1, 2021)

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24093

Related Security Bulletins

Remote code execution in Microsoft Windows Graphics Component