CVE-2019-0197

Name	CVE-2019-0197
Description	A vulnerability was found in Apache HTTP Server 2.4.34 to 2.4.38. When HTTP/2 was enabled for a http: host or H2Upgrade was enabled for h2 on a https: host, an Upgrade request from http/1.1 to http/2 that was not the first request on a connection could lead to a misconfiguration and crash. Server that never enabled the h2 protocol or that only enabled it for https: and did not set "H2Upgrade on" are unaffected by this issue.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
apache2 (PTS)	buster	2.4.38-3+deb10u8	fixed
	buster (security)	2.4.38-3+deb10u9	fixed
	bullseye	2.4.54-1~deb11u1	fixed
	bullseye (security)	2.4.56-1~deb11u1	fixed
	bookworm, sid	2.4.56-1	fixed

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

Package	Type	Release	Fixed Version
apache2	source	jessie	(not affected)
apache2	source	stretch	(not affected)
apache2	source	(unstable)	2.4.38-3

Notes

[stretch] - apache2 <not-affected> (Vulnerable code introduced later)
[jessie] - apache2 <not-affected> (Vulnerable code introduced later)
https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2019-0197