CVE Catalog

CVE-2017-7670

High
Published: Translated: NVD NIST

Summary

The Traffic Router component of the Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. TCP connections made on the configured DNS port remain in the ESTABLISHED state, which can lead to exhaustion of the thread pool processing DNS requests.

Risk Assessment

If the thread pool is exhausted, Traffic Router will be unable to service any DNS requests, potentially leading to service outages for users.

Recommendation

It is recommended to monitor TCP connections and implement mechanisms to limit the number of concurrent connections on the DNS port to prevent thread pool exhaustion.

Related vulnerabilities

Original NVD description (English source)

The Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. TCP connections made on the configured DNS port will remain in the ESTABLISHED state until the client explicitly closes the connection or Traffic Router is restarted. If connections remain in the ESTABLISHED state indefinitely and accumulate in number to match the size of the thread pool dedicated to processing DNS requests, the thread pool becomes exhausted. Once the thread pool is exhausted, Traffic Router is unable to service any DNS request, regardless of transport protocol.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS