==========================================================================
Ubuntu Security Notice USN-6780-1
May 21, 2024

python-idna vulnerability
==========================================================================

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

- Ubuntu 24.04 LTS
- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

idna could be made to consume significant resources if it receives a specially crafted input.

Software Description:
- python-idna: Python IDNA2008 (RFC 5891) handling

Details:

Guido Vranken discovered that idna did not properly manage certain inputs,
which could lead to significant resource consumption. An attacker could
possibly use this issue to cause a denial of service.

Update instructions:

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

Ubuntu 24.04 LTS
   python3-idna                    3.6-2ubuntu0.1

Ubuntu 23.10
   python3-idna                    3.3-2ubuntu0.1

Ubuntu 22.04 LTS
   python3-idna                    3.3-1ubuntu0.1

Ubuntu 20.04 LTS
   python-idna                     2.8-1ubuntu0.1
   python3-idna                    2.8-1ubuntu0.1

Ubuntu 18.04 LTS
   pypy-idna                       2.6-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   python-idna                     2.6-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   python3-idna                    2.6-1ubuntu0.1~esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   pypy-idna                       2.0-3ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   python-idna                     2.0-3ubuntu0.1~esm1
                                   Available with Ubuntu Pro
   python3-idna                    2.0-3ubuntu0.1~esm1
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-6780-1
   CVE-2024-3651

Package Information:
   https://launchpad.net/ubuntu/+source/python-idna/3.6-2ubuntu0.1
   https://launchpad.net/ubuntu/+source/python-idna/3.3-2ubuntu0.1
   https://launchpad.net/ubuntu/+source/python-idna/3.3-1ubuntu0.1
   https://launchpad.net/ubuntu/+source/python-idna/2.8-1ubuntu0.1