CVE-2012-4534 Denial of service in n/a

What is CVE-2012-4534?

CVE-2012-4534 is a low-severity denial of service vulnerability in Apache Tomcat, published on 19 Dec 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

org/apache/tomcat/util/net/NioEndpoint.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.28, when the NIO connector is used in conjunction with sendfile and HTTPS, allows remote attackers to cause a denial of service (infinite loop) by terminating the connection during the reading of a response.

Weakness: CWE-399

Which versions are affected by CVE-2012-4534?

It affects 1 product.

Products include Apache Tomcat.

How do I fix CVE-2012-4534?

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-2012-4534 being exploited?

There is no known exploitation of CVE-2012-4534 in the wild and no public exploit code.

Other vulnerabilities in Apache Tomcat

• CVE-2025-24813 Apache Tomcat Path Equivalence Exploited Critical 10.0
• CVE-2016-8735 Apache Tomcat Remote Code Execution Exploited Critical 9.8
• CVE-2017-12617 Apache Tomcat Remote Code Execution Exploited High 8.1
• CVE-2017-12615 Apache Tomcat on Windows Remote Code Execution Exploited High 8.1
• CVE-2026-34486 Apache Tomcat Missing Encryption of Sensitive Data Exploited High 7.5

All Apache Tomcat vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-pxwv-88pv-hh3j.