USN-5342-3: Python vulnerability

Releases

• Ubuntu 18.04 ESM

Packages

• python3.7 - An interactive high-level object-oriented language

Details

USN-5342-1 fixed several vulnerabilities in Python. This update provides
the corresponding fix for CVE-2021-3426 for Ubuntu 18.04 ESM.

Original advisory details:

David Schwörer discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.
This issue only affected Ubuntu 18.04 LTS. (CVE-2021-3426)

It was discovered that Python incorrectly handled certain FTP requests.
An attacker could possibly use this issue to expose sensitive information.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, and Ubuntu 18.04 LTS.
(CVE-2021-4189)

It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2022-0391)

Update instructions

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

Ubuntu 18.04

• python3.7-minimal - 3.7.5-2ubuntu1~18.04.2+esm1
  Available with Ubuntu Pro
• python3.7 - 3.7.5-2ubuntu1~18.04.2+esm1
  Available with Ubuntu Pro

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

References

• CVE-2021-3426

Related notices

• USN-5342-1: libpython3.5-dev, libpython2.7-stdlib, python3.5-venv, idle-python3.8, libpython2.7, python3.6, libpython3.4-stdlib, idle-python3.5, python3.4-minimal, python3.4-venv, python3.4, libpython2.7-minimal, libpython2.7-dev, python3.8-venv, idle-python3.6, python2.7-doc, libpython3.8-stdlib, libpython3.4-dev, libpython3.8-dev, python3.8-full, libpython3.6, libpython3.6-dev, libpython3.5, python3.8-dev, python3.4-doc, python3.8-examples, python3.6-venv, libpython3.6-stdlib, python3.8, libpython3.6-testsuite, python3.6-doc, libpython3.5-stdlib, libpython3.4-testsuite, libpython3.8, libpython3.4-minimal, python2.7, python3.6-examples, python2.7-examples, python2.7-dev, libpython3.8-testsuite, python3.6-minimal, libpython3.5-minimal, python2.7-minimal, python3.8-minimal, python3.5-minimal, python3.8-doc, libpython3.4, idle-python2.7, libpython3.6-minimal, libpython3.8-minimal, python3.5-dev, libpython2.7-testsuite, libpython3.5-testsuite, python3.5-doc, python3.5, python3.6-dev, python3.5-examples, idle-python3.4, python3.4-dev, python3.4-examples
• USN-6891-1: python3.12-full, python3.6, libpython3.12-minimal, python3.12, libpython3.7-stdlib, python3.11-doc, libpython3.5, python3.8, python3.10-dev, python3.8-minimal, python3.5-minimal, libpython3.10, python3.10-examples, libpython3.9-dev, python3.10-minimal, libpython3.12, python3.9-examples, idle-python3.9, python3.6-dev, libpython3.12-testsuite, python3.8-examples, libpython3.5-dev, python3.7, idle-python3.5, python3.9-minimal, python3.7-venv, python3.12-nopie, python3.11-examples, python3.11-full, libpython3.11, libpython3.9-minimal, libpython3.8-dev, python3.8-full, libpython3.6, libpython3.11-stdlib, python3.9, libpython3.9-stdlib, libpython3.7-testsuite, python3.6-minimal, libpython3.12-stdlib, python3.12-minimal, python3.5-doc, python3.9-venv, python3.7-minimal, python3.11-dev, libpython3.7, libpython3.10-stdlib, python3.10-venv, python3.5-venv, idle-python3.8, libpython3.11-minimal, libpython3.10-testsuite, libpython3.12-dev, libpython3.10-dev, python3.7-doc, python3.12-dev, python3.6-venv, libpython3.9, libpython3.6-testsuite, python3.11, libpython3.5-stdlib, python3.6-doc, libpython3.8, python3.6-examples, python3.10, libpython3.7-minimal, idle-python3.11, libpython3.5-minimal, libpython3.7-dev, libpython3.8-minimal, python3.5-dev, idle-python3.10, python3.11-venv, python3.9-dev, python3.10-full, python3.5, python3.11-minimal, python3.12-venv, python3.9-doc, python3.10-doc, python3.7-dev, python3.11-nopie, python3.7-examples, libpython3.11-dev, python3.12-examples, python3.8-venv, idle-python3.6, libpython3.9-testsuite, libpython3.8-stdlib, idle-python3.7, libpython3.6-dev, python3.8-dev, libpython3.6-stdlib, idle-python3.12, python3.12-doc, libpython3.8-testsuite, libpython3.10-minimal, python3.8-doc, libpython3.6-minimal, libpython3.5-testsuite, python3.10-nopie, libpython3.11-testsuite, python3.9-full, python3.5-examples