Advisory Details

November 13th, 2019

Microsoft Windows Kernel Type 1 Font Processing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-19-980
ZDI-CAN-9265

CVE ID CVE-2019-1412
CVSS SCORE 8.4, AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows attackers to disclose sensitive information on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the handling of Type 1 fonts in the Windows kernel. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and 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://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1412
DISCLOSURE TIMELINE
  • 2019-08-08 - Vulnerability reported to vendor
  • 2019-11-13 - Coordinated public release of advisory
CREDIT Hossein Lotfi of Trend Micro Zero Day Initiative
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