Advisory Details

February 13th, 2024

Microsoft Office Word PDF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability

ZDI-24-164
ZDI-CAN-21970

CVE ID CVE-2024-21379
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 Word
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Office Word. 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 PDF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current user.

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-2024-21379
DISCLOSURE TIMELINE
  • 2023-10-03 - Vulnerability reported to vendor
  • 2024-02-13 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated
CREDIT Anonymous
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