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Ubuntu Security Notice USN-6513-2
November 27, 2023

python3.8, python3.10, python3.11 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Python.

Software Description:
- python3.11: An interactive high-level object-oriented language
- python3.10: An interactive high-level object-oriented language
- python3.8: An interactive high-level object-oriented language

Details:

USN-6513-1 fixed vulnerabilities in Python. This update provides the
corresponding updates for Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and
Ubuntu 23.04.

Original advisory details:

  It was discovered that Python incorrectly handled certain plist files.
  If a user or an automated system were tricked into processing a specially
  crafted plist file, an attacker could possibly use this issue to consume
  resources, resulting in a denial of service. (CVE-2022-48564)

  It was discovered that Python instances of ssl.SSLSocket were vulnerable
  to a bypass of the TLS handshake. An attacker could possibly use this
  issue to cause applications to treat unauthenticated received data before
  TLS handshake as authenticated data after TLS handshake. (CVE-2023-40217)

Update instructions:

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

Ubuntu 23.04:
   python3.11                      3.11.4-1~23.04.1

Ubuntu 22.04 LTS:
   python3.10                      3.10.12-1~22.04.3

Ubuntu 20.04 LTS:
   python3.8                       3.8.10-0ubuntu1~20.04.9

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

References:
   https://ubuntu.com/security/notices/USN-6513-2
   https://ubuntu.com/security/notices/USN-6513-1
   CVE-2023-40217

Package Information:
   https://launchpad.net/ubuntu/+source/python3.11/3.11.4-1~23.04.1
https://launchpad.net/ubuntu/+source/python3.10/3.10.12-1~22.04.3
https://launchpad.net/ubuntu/+source/python3.8/3.8.10-0ubuntu1~20.04.9