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Ubuntu Security Notice USN-6400-1
September 27, 2023
python2.7, python3.5 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Summary:
Python could be made to expose sensitive information.
Software Description:
- python2.7: An interactive high-level object-oriented language
- python3.5: An interactive high-level object-oriented language
Details:
It was discovered that Python did not properly provide constant-time
processing for a crypto operation. An attacker could possibly use this
issue to perform a timing attack and recover sensitive information.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libpython2.7                    2.7.17-1~18.04ubuntu1.13+esm2
   libpython2.7-minimal      2.7.17-1~18.04ubuntu1.13+esm2
   libpython2.7-stdlib          2.7.17-1~18.04ubuntu1.13+esm2
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libpython2.7                    2.7.12-1ubuntu0~16.04.18+esm7
   libpython2.7-minimal      2.7.12-1ubuntu0~16.04.18+esm7
   libpython2.7-stdlib          2.7.12-1ubuntu0~16.04.18+esm7
   libpython3.5                    3.5.2-2ubuntu0~16.04.13+esm11
   libpython3.5-minimal      3.5.2-2ubuntu0~16.04.13+esm11
   libpython3.5-stdlib          3.5.2-2ubuntu0~16.04.13+esm11
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6400-1
   CVE-2022-48566