[USN-4940-1] PyYAML vulnerability

========================================================================== Ubuntu Security Notice USN-4940-1 May 10, 2021
pyyaml vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.10 – Ubuntu 20.04 LTS
PyYAML could be made to run programs if it opened a specially crafted YAML file.
Software Description: – pyyaml: YAML parser and emitter for Python
It was discovered that PyYAML incorrectly handled untrusted YAML files with the FullLoader loader. A remote attacker could possibly use this issue to execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: python3-yaml 5.3.1-2ubuntu0.1
Ubuntu 20.04 LTS: python-yaml 5.3.1-1ubuntu0.1 python3-yaml 5.3.1-1ubuntu0.1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-4940-1 CVE-2020-14343
Package Information: launchpad.net/ubuntu/+source/pyyaml/5.3.1-2ubuntu0.1 launchpad.net/ubuntu/+source/pyyaml/5.3.1-1ubuntu0.1