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Apache Tomcat DoS Vulnerability (Jul 2021) - Linux
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Apache Tomcat is prone to a denial of service (DoS) vulnerability.
Insight
Insight
An error introduced as part of a change to improve error handling during non-blocking I/O means that the error flag associated with the Request object is not reset between requests. This means that once a non-blocking I/O error occurres, all future requests handled by that request object will fail. Users are able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability.
Affected Software
Affected Software
Apache Tomcat 8.5.64, 9.0.44 and 10.0.3 through 10.0.4.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 8.5.65, 9.0.45, 10.0.5 or later.