CVE-2011-5055 Denial of service in n/a
Remote attackers can cause CPU exhaustion and denial of service in MaraDNS by sending crafted queries that trigger predictable hash 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-2011-5055?
CVE-2011-5055 is a medium-severity denial of service vulnerability in n/a, published on 8 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
MaraDNS 1.3.07.12 and 1.4.08 computes hash values for DNS data without properly restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set. NOTE: this issue exists because of an incomplete fix for CVE-2012-0024.
Weakness: CWE-20
Which versions are affected by CVE-2011-5055?
It affects 1 product.
Products include Maradns Maradns.
How do I fix CVE-2011-5055?
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-2011-5055 being exploited?
There is no known exploitation of CVE-2011-5055 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2011-5055, GHSA-cm5j-hcw6-754p.