Ubuntu alert USN-4973-2 (python3.8)

From:
             
 
"Leonidas S. Barbosa" <leo.barbosa@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-4973-2] Python vulnerability
Date:
             
 
Mon, 04 Oct 2021 11:55:16 -0300
Message-ID:
             
 
<20211004145516.GA632044@d4rkl41n>
==========================================================================
Ubuntu Security Notice USN-4973-2
October 04, 2021

python3.8 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Python could allow unintended access to network services.

Software Description:
- python3.8: An interactive high-level object-oriented language

Details:

USN-4973-1 fixed this vulnerability previously, but it was re-introduced
in python3.8 in focal because of the SRU in LP: #1928057. This update fixes
the problem.

Original advisory details:

 It was discovered that the Python stdlib ipaddress API incorrectly handled
 octal strings. A remote attacker could possibly use this issue to perform a
 wide variety of attacks, including bypassing certain access restrictions.

Update instructions:

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

Ubuntu 20.04 LTS:
  python3.8                       3.8.10-0ubuntu1~20.04.1
  python3.8-minimal               3.8.10-0ubuntu1~20.04.1

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

References:
  https://ubuntu.com/security/notices/USN-4973-2
  https://ubuntu.com/security/notices/USN-4973-1
  CVE-2021-29921, https://launchpad.net/bugs/1945240

Package Information:
  https://launchpad.net/ubuntu/+source/python3.8/3.8.10-0ub...
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