Advisory Details

January 18th, 2023

Microsoft Office Visio DXF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-23-005
ZDI-CAN-19092

CVE ID CVE-2023-21736
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office Visio
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Office Visio. 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 DXF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

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-2023-21736
DISCLOSURE TIMELINE
  • 2022-10-04 - Vulnerability reported to vendor
  • 2023-01-18 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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