CVE-2023-33162: Microsoft Excel Information Disclosure Vulnerability

Overview

Severity
Medium (CVSS 5.5)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2023-Jul
Released
2023-07-11
EPSS Score
0.81% (percentile: 74.2%)

FAQ

According to the CVSS metric, the attack vector is local (AV:L). Why does the CVE title indicate that this is information disclosure? The attack itself is carried out locally. For example, when the score indicates that the Attack Vector is Local and User Interaction is Required, this could describe an exploit in which an attacker, through social engineering, convinces a victim to download and open a specially crafted file from a website which leads to a local attack on their computer which could leak data. What type of information could be disclosed by this vulnerability? An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory. Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector.

Affected Products (14)

Microsoft Office

  • Microsoft Office 2019 for 32-bit editions
  • Microsoft Office 2019 for 64-bit editions
  • Microsoft Office 2019 for Mac
  • Microsoft Office Online Server
  • Microsoft 365 Apps for Enterprise for 32-bit Systems
  • Microsoft 365 Apps for Enterprise for 64-bit Systems
  • Microsoft Office LTSC for Mac 2021
  • Microsoft Office LTSC 2021 for 64-bit editions
  • Microsoft Office LTSC 2021 for 32-bit editions
  • Microsoft Excel 2016 (32-bit edition)
  • Microsoft Excel 2016 (64-bit edition)
  • Microsoft Excel 2013 RT Service Pack 1
  • Microsoft Excel 2013 Service Pack 1 (32-bit editions)
  • Microsoft Excel 2013 Service Pack 1 (64-bit editions)

Security Updates (6)

Acknowledgments

Genwei Jiang with <a href="https://www.mandiant.com/">Mandiant, FLARE OTF</a>, Dhanesh Kizhakkinan with <a href="https://www.mandiant.com/">Mandiant, FLARE OTF</a>, <a href="https://twitter.com/leeqwind">Li Qi</a>, <a href="https://twitter.com/aalizzwell">Dong Kangwei</a> and Zhang Yanping with <a href="https://ata.360.net/help/docs/introduction">360 HuntingZero Lab</a>

Revision History

  • 2023-07-11: Information published.