CVE-2021-44540 Denial of service in Privoxy
A memory leak in Privoxy's URL parameter handling allows attackers to exhaust system memory, causing a 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-2021-44540?
CVE-2021-44540 is a high-severity denial of service vulnerability in Privoxy, published on 23 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was found in Privoxy which was fixed in get_url_spec_param() by freeing memory of compiled pattern spec before bailing.
Weakness: CWE-401
Which versions are affected by CVE-2021-44540?
It affects 1 product.
Products include Privoxy Privoxy.
How do I fix CVE-2021-44540?
Apply the vendor's patch.
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-2021-44540 being exploited?
There is no known exploitation of CVE-2021-44540 in the wild and no public exploit code.
Other vulnerabilities in Privoxy
Sources
Also known as ALPINE-CVE-2021-44540, DEBIAN-CVE-2021-44540, GHSA-c56j-2h63-6488, UBUNTU-CVE-2021-44540.