Ubuntu Security Notices
USN-4699-1

USN-4699-1: Apache Log4net vulnerability

Publication date

19 January 2021

Overview

Apache Log4net could made to expose sensitive information if it received a specially crafted configuration file.

Releases

20.10 20.04 LTS 18.04 LTS 16.04 LTS

Packages

log4net - Highly configurable logging API for the CLI log4net

Details

It was discovered that Apache Log4net incorrectly handled certain configuration files.
An attacker could possibly use this issue to expose sensitive information.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release	Package Version
20.10 groovy	liblog4net1.2-cil – 1.2.10+dfsg-7ubuntu0.20.10.1
20.04 focal	liblog4net1.2-cil – 1.2.10+dfsg-7ubuntu0.20.04.1
18.04 bionic	liblog4net1.2-cil – 1.2.10+dfsg-7ubuntu0.18.04.1
16.04 xenial	liblog4net1.2-cil – 1.2.10+dfsg-7ubuntu0.16.04.1

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References

CVE-2018-1285

CVE-2018-1285