CVE-2021-20217 Denial of service in privoxy
A crafted CGI request triggers an assertion failure in Privoxy, causing a denial of service and impacting system availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-20217?
CVE-2021-20217 is a high-severity denial of service vulnerability in privoxy, published on 25 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in Privoxy in versions before 3.0.31. An assertion failure triggered by a crafted CGI request may lead to denial of service. The highest threat from this vulnerability is to system availability.
Weakness: CWE-617
Which versions are affected by CVE-2021-20217?
It affects 1 product.
Products include Privoxy Privoxy.
How do I fix CVE-2021-20217?
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-2021-20217 being exploited?
There is no known exploitation of CVE-2021-20217 in the wild and no public exploit code.
Other vulnerabilities in privoxy
Sources
Also known as ALPINE-CVE-2021-20217, DEBIAN-CVE-2021-20217, GHSA-r622-5ggq-2mh5, UBUNTU-CVE-2021-20217.