Your submission was sent successfully! Close

Thank you for contacting us. A member of our team will be in touch shortly. Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

CVE-2021-44228

Publication date 10 December 2021

Last updated 21 August 2024

Ubuntu priority

High

Why this priority?

Cvss 3 Severity Score

10.0 · Critical

Score breakdown

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

Read the notes from the security team

Status

Package Ubuntu Release Status
apache-log4j2 22.04 LTS jammy
Not affected
21.10 impish
Fixed 2.15.0-0.21.10.1
21.04 hirsute
Fixed 2.15.0-0.21.04.1
20.04 LTS focal
Fixed 2.15.0-0.20.04.1
18.04 LTS bionic
Fixed 2.10.0-2ubuntu0.1
16.04 LTS xenial
14.04 LTS trusty Not in release

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro

Notes

mdeslaur

apache-log4j1.2 contains a similar issue in a non-default configuration, and it was assigned CVE-2021-4104, see that CVE for information about apache-log4j1.2

Patch details

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

Package Patch details
apache-log4j2

Severity score breakdown

Parameter Value
Base score 10.0 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H