CVE-2014-0239 Denial of service in n/a
Remote attackers can cause denial of service in Samba's internal DNS server by sending forged response packets that trigger communication loops.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2014-0239?
CVE-2014-0239 is a medium-severity denial of service vulnerability in Samba Samba, published on 28 May 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header section of an incoming DNS message before sending a response, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged response packet that triggers a communication loop, a related issue to CVE-1999-0103.
Weakness: CWE-20
Which versions are affected by CVE-2014-0239?
It affects 1 product.
Products include Samba Samba.
How do I fix CVE-2014-0239?
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-2014-0239 being exploited?
There is no known exploitation of CVE-2014-0239 in the wild and no public exploit code.
Other vulnerabilities in Samba Samba
Sources
Also known as DEBIAN-CVE-2014-0239, ECHO-d287-ef1a-ddd2, GHSA-4rm5-v8f4-mx8v, UBUNTU-CVE-2014-0239.