Advisory Details

May 10th, 2022

Microsoft Windows OpenType Font File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-22-728
ZDI-CAN-15915

CVE ID CVE-2022-26927
CVSS SCORE 9.6, (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of OpenType font files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the kernel.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26927
DISCLOSURE TIMELINE
  • 2021-12-22 - Vulnerability reported to vendor
  • 2022-05-10 - Coordinated public release of advisory
CREDIT Uncodable
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