[USN-4699-1] Apache Log4net vulnerability

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[USN-4699-1] Apache Log4net vulnerability

Leonidas S. Barbosa
Ubuntu Security Notice USN-4699-1
January 19, 2021

log4net vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS


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

Software Description:
- log4net: Highly configurable logging API for the CLI log4net


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

Update instructions:

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

Ubuntu 20.10:
  liblog4net1.2-cil               1.2.10+dfsg-7ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  liblog4net1.2-cil               1.2.10+dfsg-7ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  liblog4net1.2-cil               1.2.10+dfsg-7ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  liblog4net1.2-cil               1.2.10+dfsg-7ubuntu0.16.04.1

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


Package Information:

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