Advisory Details

December 14th, 2023

Microsoft Excel SKP File Parsing Uninitialized Variable Information Disclosure Vulnerability

ZDI-23-1789
ZDI-CAN-20358

CVE ID CVE-2023-33146
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 Excel
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Microsoft Excel. 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 proper initialization of memory prior to accessing it. 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://msrc.microsoft.com/update-guide/en-us/advisory/CVE-2023-33146
DISCLOSURE TIMELINE
  • 2023-02-08 - Vulnerability reported to vendor
  • 2023-12-14 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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