Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service. The attacker sends continual pings to an HTTP/2 peer, causing the peer to build an internal queue of responses. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9512
Reference (s):
- BUGTRAQ:20190814 APPLE-SA-2019-08-13-5 SwiftNIO HTTP/2 1.5.0
- URL: https://seclists.org/bugtraq/2019/Aug/24
- BUGTRAQ:20190819 [SECURITY] [DSA 4503-1] golang-1.11 security update
- URL: https://seclists.org/bugtraq/2019/Aug/31
- BUGTRAQ:20190825 [SECURITY] [DSA 4508-1] h2o security update