CVE-2011-2189 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption by exploiting improper handling of network namespace creation and cleanup in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-2189?
CVE-2011-2189 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 10 Oct 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.
Weakness: CWE-400
Which versions are affected by CVE-2011-2189?
It affects 5 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Mrg.
How do I fix CVE-2011-2189?
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-2011-2189 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-2189 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2011-2189, GHSA-cwc9-v946-jvqj.