CVE-2018-8378 Information disclosure in Microsoft Excel Viewer
An attacker can disclose memory contents via an uninitialized variable in Microsoft Office applications, potentially exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2018-8378?
CVE-2018-8378 is a medium-severity vulnerability in Microsoft Excel Viewer, published on 15 Aug 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory, aka "Microsoft Office Information Disclosure Vulnerability." This affects Word, Microsoft SharePoint Server, Microsoft Office Word Viewer, Microsoft Excel Viewer, Microsoft SharePoint, Microsoft Office.
Which versions are affected by CVE-2018-8378?
It affects 9 products.
Products include Microsoft Excel Viewer, Microsoft Office, Microsoft Office Compatibility Pack, Microsoft Office Web Apps, Microsoft Office Word Viewer, Microsoft Sharepoint Enterprise Server 2013 and 3 more.
How do I fix CVE-2018-8378?
No fix has been published for CVE-2018-8378 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-8378 being exploited?
There is no known exploitation of CVE-2018-8378 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Excel Viewer
Sources
Also known as GHSA-q4j3-h8qw-m7m4.