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VuXML IDDescription
f25a34b1-910d-11ee-a1a2-641c67a117d8varnish -- HTTP/2 Rapid Reset Attack

Varnish Cache Project reports:

A denial of service attack can be performed on Varnish Cache servers that have the HTTP/2 protocol turned on. An attacker can create a large volume of streams and immediately reset them without ever reaching the maximum number of concurrent streams allowed for the session, causing the Varnish server to consume unnecessary resources processing requests for which the response will not be delivered.


Discovery 2023-11-13
Entry 2023-12-02
varnish7
< 7.4.2

varnish6
< 6.6.3

CVE-2023-44487
https://varnish-cache.org/security/VSV00013.html