CVE-2023-23396 Microsoft Excel Denial of Service Vulnerability
Attackers can cause a denial of service in Microsoft Office Online Server by exploiting a resource exhaustion vulnerability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-23396?
CVE-2023-23396 is a medium-severity denial of service vulnerability in Microsoft Office Online Server, published on 14 Mar 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Microsoft Excel Denial of Service Vulnerability
Weakness: CWE-400
Which versions are affected by CVE-2023-23396?
It affects 2 products.
Products include Microsoft Office Online Server, Microsoft Office Web Apps Server.
How do I fix CVE-2023-23396?
No fix has been published for CVE-2023-23396 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-23396 being exploited?
There is no known exploitation of CVE-2023-23396 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Office Online Server
- CVE-2022-33648 Microsoft Excel Remote Code Execution Vulnerability
- CVE-2017-8743 Memory corruption in Microsoft Office
- CVE-2020-1442 Cross-site scripting in Microsoft Office Online Server
- CVE-2022-30159 Microsoft Office Information Disclosure Vulnerability
- CVE-2022-30171 Microsoft Office Information Disclosure Vulnerability
Sources
Also known as GHSA-gp6v-q35c-7fh4.