CVE-2021-34798

Publication date 16 September 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	22.04 LTS jammy	Fixed 2.4.48-3.1ubuntu2
	21.10 impish	Fixed 2.4.48-3.1ubuntu2
	21.04 hirsute	Fixed 2.4.46-4ubuntu1.2
	20.04 LTS focal	Fixed 2.4.41-4ubuntu3.5
	18.04 LTS bionic	Fixed 2.4.29-1ubuntu4.17
	16.04 LTS xenial	Fixed 2.4.18-2ubuntu3.17+esm2
	14.04 LTS trusty	Fixed 2.4.7-1ubuntu4.22+esm2

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Patch details

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

Package	Patch details
apache2	Upstream: fa7b2a5

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H