CVE-2018-16789 Denial of service in n/a
An attacker can cause a denial of service in ShellInabox by sending a crafted HTTP request that triggers an infinite loop, exhausting CPU resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-16789?
CVE-2018-16789 is a high-severity denial of service vulnerability in n/a, published on 17 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
libhttp/url.c in shellinabox through 2.20 has an implementation flaw in the HTTP request parsing logic. By sending a crafted multipart/form-data HTTP request, an attacker could exploit this to force shellinaboxd into an infinite loop, exhausting available CPU resources and taking the service down.
Weakness: CWE-835
Which versions are affected by CVE-2018-16789?
It affects 1 product.
Products include Shellinabox Project Shellinabox.
How do I fix CVE-2018-16789?
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-2018-16789 being exploited?
There is no known exploitation of CVE-2018-16789 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2018-16789, GHSA-c93f-9f7g-fv7h, UBUNTU-CVE-2018-16789.