CVE-2021-26691

Publication date 10 June 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.8 · Critical

Score breakdown

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

Status

Package Ubuntu Release Status
apache2 22.04 LTS jammy
Fixed 2.4.46-4ubuntu2
21.10 impish
Fixed 2.4.46-4ubuntu2
21.04 hirsute
Fixed 2.4.46-4ubuntu1.1
20.10 groovy
Fixed 2.4.46-1ubuntu1.2
20.04 LTS focal
Fixed 2.4.41-4ubuntu3.3
18.04 LTS bionic
Fixed 2.4.29-1ubuntu4.16
16.04 LTS xenial
14.04 LTS trusty

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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

Severity score breakdown

Parameter Value
Base score 9.8 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H