USN-4127-2: Python vulnerabilities
10 September 2019
Several security issues were fixed in Python.
USN-4127-1 fixed several vulnerabilities in Python. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Python incorrectly handled certain pickle files. An
attacker could possibly use this issue to consume memory, leading to a
denial of service. This issue only affected Ubuntu 14.04 ESM. (CVE-2018-20406)
It was discovered that Python incorrectly validated the domain when
handling cookies. An attacker could possibly trick Python into sending
cookies to the wrong domain. (CVE-2018-20852)
Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly
handled Unicode encoding during NFKC normalization. An attacker could
possibly use this issue to obtain sensitive information. (CVE-2019-9636,
Colin Read and Nicolas Edet discovered that Python incorrectly handled
parsing certain X509 certificates. An attacker could possibly use this
issue to cause Python to crash, resulting in a denial of service. This
issue only affected Ubuntu 14.04 ESM. (CVE-2019-5010)
Sihoon Lee discovered that Python incorrectly handled the local_file:
scheme. A remote attacker could possibly use this issue to bypass blacklist
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.
- USN-4127-1: libpython3.7, python3.5-doc, libpython2.7, libpython3.6-stdlib, python3.7-venv, libpython3.5-dev, python3.5-examples, libpython3.7-stdlib, libpython3.7-minimal, python2.7-minimal, idle-python2.7, python3.6-dev, libpython3.6-testsuite, libpython3.6-minimal, libpython3.7-dev, libpython2.7-stdlib, python3.7, python3.6-examples, python3.7-examples, python2.7, python3.5-venv, libpython3.6-dev, libpython3.6, libpython3.5-testsuite, python3.6-doc, python3.7-minimal, idle-python3.6, python3.5-dev, python3.6-venv, python2.7-examples, idle-python3.7, python2.7-doc, python3.5, libpython3.5, libpython2.7-dev, python3.6-minimal, idle-python3.5, python3.6, libpython3.7-testsuite, libpython3.5-minimal, libpython3.5-stdlib, python3.5-minimal, python3.7-dev, python2.7-dev, libpython2.7-minimal, libpython2.7-testsuite, python3.7-doc