CVE-2012-6125 Denial of service in chicken

Critical 9.8 Published 31 Oct 2019 Updated 6 Aug 2024

Attackers can cause denial of service in Chicken Scheme compiler via algorithmic complexity attacks exploiting hash table collisions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2012-6125?

CVE-2012-6125 is a critical denial of service vulnerability in chicken, published on 31 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Chicken before 4.8.0 is susceptible to algorithmic complexity attacks related to hash table collisions.

Weakness: CWE-20

Which versions are affected by CVE-2012-6125?

It affects 1 product.

Products include Call-Cc Chicken.

How do I fix CVE-2012-6125?

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-2012-6125 being exploited?

There is no known exploitation of CVE-2012-6125 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2012-6125, GHSA-qx8c-5326-hjwh.