CVE-2012-2733 Denial of service in n/a
Remote attackers can cause denial of service via memory consumption by sending excessive header data to Apache Tomcat's HTTP NIO connector.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2012-2733?
CVE-2012-2733 is a medium-severity denial of service vulnerability in Apache Tomcat, published on 16 Nov 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
java/org/apache/coyote/http11/InternalNioInputBuffer.java in the HTTP NIO connector in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28 does not properly restrict the request-header size, which allows remote attackers to cause a denial of service (memory consumption) via a large amount of header data.
Weakness: CWE-20
Which versions are affected by CVE-2012-2733?
It affects 1 product.
Products include Apache Tomcat.
How do I fix CVE-2012-2733?
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-2012-2733 being exploited?
There is no known exploitation of CVE-2012-2733 in the wild and no public exploit code.
Other vulnerabilities in Apache Tomcat
Sources
Also known as GHSA-cpr9-82wf-f629.