CVE-2021-20212 Denial of service in privoxy
A memory leak in Privoxy when filters are skipped due to PCRE errors can cause a system crash, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-20212?
CVE-2021-20212 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 3.0.29. Memory leak if multiple filters are executed and the last one is skipped due to a pcre error leading to a system crash.
Weakness: CWE-401
Which versions are affected by CVE-2021-20212?
It affects 1 product.
Products include Privoxy Privoxy.
How do I fix CVE-2021-20212?
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-2021-20212 being exploited?
There is no known exploitation of CVE-2021-20212 in the wild and no public exploit code.
Other vulnerabilities in privoxy
Sources
Also known as ALPINE-CVE-2021-20212, DEBIAN-CVE-2021-20212, GHSA-hj2g-7c54-g4v7, UBUNTU-CVE-2021-20212.