Microsoft Word DOC File Parsing Use-After-Free Remote Code Execution Vulnerability

July 29th, 2024
ZDI-24-984 ZDI-CAN-18535

CVE ID

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

Word

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft 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 DOC files. Crafted data in a DOC file can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Fixed in version 16.0.17231.20236


Disclosure Timeline

  • 2022-08-25 - Vulnerability reported to vendor
  • 2024-07-29 - Coordinated public release of advisory
  • 2024-08-15 - Advisory Updated

Credit

Hossein Lotfi of Trend Micro Zero Day Initiative

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