CVE-2023-34188 Denial of service in n/a
An attacker can cause a denial of service in the Mongoose HTTP server by sending requests with negative Content-Length headers, leading to an infinite loop.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-34188?
CVE-2023-34188 is a high-severity denial of service vulnerability in Cesanta Mongoose, published on 23 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The HTTP server in Mongoose before 7.10 accepts requests containing negative Content-Length headers. By sending a single attack payload over TCP, an attacker can cause an infinite loop in which the server continuously reparses that payload, and does not respond to any other requests.
Weakness: CWE-1284
Which versions are affected by CVE-2023-34188?
It affects 1 product.
Products include Cesanta Mongoose.
How do I fix CVE-2023-34188?
Upgrade to a fixed version.
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-2023-34188 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34188 exists.
Other vulnerabilities in Cesanta Mongoose
Sources
Also known as DEBIAN-CVE-2023-34188, GHSA-pcw9-xw4x-jgj3, UBUNTU-CVE-2023-34188.