USN-4754-4: Python 2.7 vulnerability

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• python2.7 - An interactive high-level object-oriented language

Details

USN-4754-1 fixed vulnerabilities in Python. Because of a regression, a
subsequent update removed the fix for CVE-2021-3177. This update reinstates
the security fix for CVE-2021-3177.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Python incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)

Update instructions

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

Ubuntu 18.04

• python2.7 - 2.7.17-1~18.04ubuntu1.6
• python2.7-minimal - 2.7.17-1~18.04ubuntu1.6

Ubuntu 16.04

• python2.7 - 2.7.12-1ubuntu0~16.04.18
• python2.7-minimal - 2.7.12-1ubuntu0~16.04.18

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

References

• CVE-2021-3177

Related notices

• USN-4754-1: libpython3.4-stdlib, idle-python3.4, idle-python3.8, libpython3.5, libpython3.6-minimal, libpython3.6-stdlib, idle-python2.7, python3.5-examples, python2.7-dev, python3.8-doc, libpython3.5-dev, libpython3.4, libpython3.4-minimal, libpython3.8, python3.4-venv, python3.6-venv, libpython3.5-minimal, libpython3.8-minimal, python2.7-examples, python3.5-venv, libpython3.8-testsuite, python3.8-venv, python2.7, python3.4-examples, python3.6-minimal, python3.5-doc, python3.4, python3.8-dev, python3.4-minimal, libpython3.8-dev, python3.5-minimal, python3.5-dev, libpython2.7, idle-python3.6, python3.4-dev, idle-python3.5, python3.6-doc, python2.7-doc, python3.5, python3.8-examples, libpython3.6, libpython3.6-dev, libpython3.8-stdlib, python3.6, python3.6-dev, python2.7-minimal, libpython3.6-testsuite, python3.6-examples, libpython3.4-testsuite, python3.4-doc, libpython3.4-dev, python3.8, libpython2.7-dev, libpython2.7-minimal, libpython2.7-testsuite, python3.8-minimal, libpython3.5-stdlib, libpython3.5-testsuite, libpython2.7-stdlib
• USN-4754-3: libpython3.7-testsuite, idle-python3.8, idle-python2.7, python2.7-dev, libpython3.8, idle-python3.7, libpython3.8-minimal, python2.7-examples, libpython3.8-testsuite, libpython3.7-minimal, python3.8-venv, python2.7, libpython3.7-dev, python3.7-minimal, python3.8-dev, python3.7-doc, libpython3.8-dev, libpython2.7, python2.7-doc, python3.8-examples, libpython3.8-stdlib, python2.7-minimal, python3.7-examples, libpython3.7, python3.8, libpython2.7-dev, libpython2.7-minimal, libpython2.7-testsuite, python3.7, libpython3.7-stdlib, python3.8-minimal, python3.7-dev, python3.7-venv, libpython2.7-stdlib
• USN-4754-5: python2.7-examples, idle-python2.7, libpython2.7-minimal, libpython2.7-dev, libpython2.7, libpython2.7-testsuite, python2.7, python2.7-dev, python2.7-doc, python2.7-minimal, libpython2.7-stdlib
• USN-6891-1: libpython3.5, python3.8-doc, libpython3.11-stdlib, python3.10-examples, python3.11-nopie, libpython3.8, python3.12-doc, libpython3.8-minimal, python3.10-full, python3.12-full, python3.12-nopie, libpython3.7-dev, python3.7-minimal, python3.11-dev, libpython3.11-minimal, libpython3.12-stdlib, python3.6-doc, python3.5, libpython3.6-dev, python3.11-minimal, python3.6-examples, python3.11-full, python3.10-dev, libpython3.9-dev, libpython3.9-minimal, libpython3.5-stdlib, python3.12-examples, python3.7-dev, python3.12-venv, python3.9-dev, libpython3.9, python3.5-examples, libpython3.5-dev, python3.9-venv, idle-python3.9, python3.12-minimal, libpython3.12-testsuite, python3.5-venv, libpython3.11-dev, python3.10-venv, libpython3.10-dev, python3.12-dev, libpython3.11, python3.12, python3.8-examples, libpython3.8-stdlib, python3.6-dev, python3.7-examples, libpython3.6-testsuite, libpython3.10-testsuite, python3.9-doc, python3.11, idle-python3.11, python3.7-venv, libpython3.7-testsuite, idle-python3.8, libpython3.6-minimal, idle-python3.7, libpython3.7-minimal, python3.8-venv, python3.9-examples, libpython3.10-minimal, idle-python3.10, python3.6-minimal, python3.5-doc, libpython3.10, python3.7-doc, libpython3.8-dev, python3.5-dev, idle-python3.6, python3.11-examples, idle-python3.5, libpython3.12-dev, python3.8-full, libpython3.6, libpython3.9-stdlib, python3.6, idle-python3.12, libpython3.7, python3.10-doc, python3.8-minimal, python3.10-nopie, libpython3.6-stdlib, libpython3.10-stdlib, python3.6-venv, libpython3.5-minimal, libpython3.9-testsuite, libpython3.8-testsuite, libpython3.12, libpython3.11-testsuite, libpython3.12-minimal, python3.8-dev, python3.5-minimal, python3.9-minimal, python3.10, python3.10-minimal, python3.9-full, python3.8, python3.11-doc, python3.7, libpython3.7-stdlib, python3.11-venv, libpython3.5-testsuite, python3.9