CVE-2022-39380 wire-webapp contains Improper Handling of Exceptional Conditions leading to a DoS via Markdown Rendering
Attackers can cause a denial of service in Wire web-app by sending specific Markdown messages that crash the chat history rendering.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-39380?
CVE-2022-39380 is a medium-severity denial of service vulnerability in wireapp wire-webapp, published on 27 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Wire web-app is part of Wire communications. Versions prior to 2022-11-02 are subject to Improper Handling of Exceptional Conditions. In the wire-webapp, certain combinations of Markdown formatting can trigger an unhandled error in the conversion to HTML representation. The error makes it impossible to display the affected chat history, other conversations are not affected. The issue has been fixed in version 2022-11-02 and is already deployed on all Wire managed services. On-premise instances of wire-webapp need to be updated to docker tag 2022-11-02-production.0-v0.31.9-0-337e400 or wire-server 2022-11-03 (chart/4.26.0), so that their applications are no longer affected. As a workaround, you may use an iOS or Android client and delete the corresponding message from the history OR write 30 or more messages into the affected conversation to prevent the client from further rendering of the corresponding message. When attempting to retrieve messages from the conversation history, the error will continue to occur once the malformed message is part of the result.
Weakness: CWE-755
Which versions are affected by CVE-2022-39380?
It affects 1 product.
Products include Wire Wire-Webapp.
How do I fix CVE-2022-39380?
No fix has been published for CVE-2022-39380 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-2022-39380 being exploited?
There is no known exploitation of CVE-2022-39380 in the wild and no public exploit code.
Other vulnerabilities in wireapp wire-webapp
Sources
Also known as GHSA-v5mf-358q-w7m4.