CVE-2019-0197

Publication date 11 June 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	19.04 disco	Fixed 2.4.38-2ubuntu2.2
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Fixed 2.4.29-1ubuntu4.10
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
apache2	Upstream: http://svn.apache.org/viewvc?view=revision&revision=1855406

Severity score breakdown

Parameter	Value
Base score	4.2 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

References

Related Ubuntu Security Notices (USN)

USN-4113-1
Apache HTTP Server vulnerabilities
29 August 2019