CVE-2019-9515

Name	CVE-2019-9515
Description	Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service. The attacker sends a stream of SETTINGS frames to the peer. Since the RFC requires that the peer reply with one acknowledgement per SETTINGS frame, an empty SETTINGS frame is almost equivalent in behavior to a ping. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-4508-1, DSA-4520-1
Debian Bugs	934886, 934887

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
h2o (PTS)	buster	2.2.5+dfsg2-2+deb10u1	fixed
	buster (security)	2.2.5+dfsg2-2+deb10u2	fixed
	bullseye	2.2.5+dfsg2-6	fixed
	bookworm	2.2.5+dfsg2-7	fixed
	trixie	2.2.5+dfsg2-8	fixed
	sid	2.2.5+dfsg2-8.1	fixed
trafficserver (PTS)	buster	8.0.2+ds-1+deb10u6	fixed
	buster (security)	8.1.7-0+deb10u3	fixed
	bullseye	8.1.9+ds-1~deb11u1	fixed
	bullseye (security)	8.1.10+ds-1~deb11u1	fixed
	bookworm	9.2.3+ds-1+deb12u1	fixed
	bookworm (security)	9.2.4+ds-0+deb12u1	fixed
	sid	9.2.4+ds-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
h2o	source	buster	2.2.5+dfsg2-2+deb10u1	DSA-4508-1
h2o	source	(unstable)	2.2.5+dfsg2-3		934886
trafficserver	source	buster	8.0.2+ds-1+deb10u1	DSA-4520-1
trafficserver	source	(unstable)	8.0.5+ds-1		934887

Notes

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
https://nodejs.org/en/blog/vulnerability/aug-2019-security-releases/
https://raw.githubusercontent.com/apache/trafficserver/8.0.x/CHANGELOG-8.0.4
https://github.com/h2o/h2o/issues/2090
https://github.com/h2o/h2o/commit/743d6b6118c29b75d0b84ef7950a2721c32dfe3f