Advisory Details

December 14th, 2023

Microsoft Word SKP File Parsing Use-After-Free Information Disclosure Vulnerability

ZDI-23-1784
ZDI-CAN-18976

CVE ID
CVSS SCORE 3.3, AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Word
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information 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 SKP 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 in conjunction with other vulnerabilities to execute arbitrary 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://insider.microsoft365.com/en-us/blog/add-sketchup-files-to-office-creations
DISCLOSURE TIMELINE
  • 2022-09-22 - Vulnerability reported to vendor
  • 2023-12-14 - Coordinated public release of advisory
CREDIT Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative
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