Advisory Details

January 18th, 2023

Microsoft Office SKP File Parsing Use-After-Free Remote Code Execution Vulnerability

ZDI-23-008
ZDI-CAN-18601

CVE ID CVE-2023-21735
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
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Office. 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 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-2023-21735
DISCLOSURE TIMELINE
  • 2022-10-06 - Vulnerability reported to vendor
  • 2023-01-18 - Coordinated public release of advisory
CREDIT khangkito - Tran Van Khang (VinCSS)
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