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. The Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Slowloris HTTP Denial of Service: An attacker can cause a Denial of Service (DoS) by sending headers very slowly keeping HTTP or HTTPS connections and associated resources alive for a long period of time. CVSS 3.0 Base score 7.4 (Availability impacts). The web api server on Port 8080 of ASUS HG100 firmware up to 1.05.12, which is vulnerable to Slowloris HTTP Denial of Service: an attacker can cause a Denial of Service (DoS) by sending headers very slowly to keep HTTP or HTTPS connections and associated resources alive for a long period of time. On versions 15.1.0-15.1.0.5, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, when a BIG-IP system that has a virtual server configured with an HTTP compression profile processes compressed HTTP message payloads that require deflation, a Slowloris-style attack can trigger an out-of-memory condition on the BIG-IP system. Improper connection handling in the base connection handler in IKTeam BearFTP before v0.3.1 allows a remote attacker to achieve denial of service via a Slowloris approach by sending a large volume of small packets. In Couchbase Server 6.0.3 and Couchbase Sync Gateway through 2.7.0, the Cluster management, views, query, and full-text search endpoints are vulnerable to the Slowloris denial-of-service attack because they don't more aggressively terminate slow connections.
#Apache prevent slowloris attack Patch#
The fix is very small and a git patch is available for those using unsupported versions of Puma. This is not advised when using `puma` without a reverse proxy, such as `nginx` or `apache`, because you will open yourself to slow client attacks (e.g. Setting `queue_requests false` also fixes the issue. This problem has been fixed in `puma` 4.3.8 and 5.3.1. A `puma` server which received more concurrent `keep-alive` connections than the server had threads in its threadpool would service only a subset of connections, denying service to the unserved connections. However, new connections may still be starved by greedy persistent-connections saturating all threads in all processes in the cluster. The original fix only protected existing connections that had already been accepted from having their requests starved by greedy persistent-connections saturating all threads in the same process. The fix for CVE-2019-16770 was incomplete.
Puma is a concurrent HTTP 1.1 server for Ruby/Rack applications. Specifically, the repository that OctoRPKI sends HTTP requests to will keep the connection open for a day before a response is returned, but does keep drip feeding new bytes to keep the connection alive. OctoRPKI does not limit the length of a connection, allowing for a slowloris DOS attack to take place which makes OctoRPKI wait forever.
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