CVE-2020-36661 Kong lua-multipart multipart.lua is_header redos
An attacker can cause denial of service in Kong lua-multipart via inefficient regular expression complexity in the is_header function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-36661?
CVE-2020-36661 is a low-severity denial of service vulnerability in Kong lua-multipart, published on 12 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in Kong lua-multipart 0.5.8-1. It has been declared as problematic. This vulnerability affects the function is_header of the file src/multipart.lua. The manipulation leads to inefficient regular expression complexity. Upgrading to version 0.5.9-1 is able to address this issue. The patch is identified as d632e5df43a2928fd537784a99a79dec288bf01b. It is recommended to upgrade the affected component. VDB-220642 is the identifier assigned to this vulnerability.
Weakness: CWE-1333
Which versions are affected by CVE-2020-36661?
It affects 1 product.
Products include Konghq Multipart.
How do I fix CVE-2020-36661?
No fix has been published for CVE-2020-36661 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-2020-36661 being exploited?
There is no known exploitation of CVE-2020-36661 in the wild and no public exploit code.
Sources
Also known as GHSA-wjp8-5g4j-4rjj.