A variety of Denial of Service vulnerabilities were found in third-party implementations of HTTP/2.

Multiple Denial of Service (DoS) Vulnerabilities in HTTP/2 Disclosed (CVE-2019-9511, CVE-2019-9518)

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.

Detections

Analytics

CVE-2019-9511

high

Vulnerable Software