CVE-2024-36387

Publication date 1 July 2024

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Serving WebSocket protocol upgrades over a HTTP/2 connection could result in a Null Pointer dereference, leading to a crash of the server process, degrading performance.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	24.10 oracular	Fixed 2.4.62-1ubuntu1
	24.04 LTS noble	Fixed 2.4.58-1ubuntu8.2
	23.10 mantic	Fixed 2.4.57-2ubuntu2.5
	22.04 LTS jammy	Fixed 2.4.52-1ubuntu4.10
	20.04 LTS focal	Fixed 2.4.41-4ubuntu3.19
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

While this issue was introduced in 2.4.55, the http2 module was backported to earlier Ubuntu releases.

Patch details

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

Package	Patch details
apache2	Upstream: c69a51b Upstream: https://svn.apache.org/viewvc?view=revision&revision=1918557 Upstream: 62aa64e

Severity score breakdown

Parameter	Value
Base score	5.4 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References

Related Ubuntu Security Notices (USN)

USN-6885-1
Apache HTTP Server vulnerabilities
8 July 2024