========================================================================== Ubuntu Security Notice USN-5812-1 January 19, 2023 python-urllib3 vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: urllib3 could be made to stop responding if it received specially crafted network traffic. Software Description: - python-urllib3: HTTP library with thread-safe connection pooling Details: It was discovered that urllib3 incorrectly handled certain characters in URLs. A remote attacker could possibly use this issue to cause urllib3 to consume resources, leading to a denial of service. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: python3-urllib3 1.25.8-2ubuntu0.2 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5812-1 CVE-2021-33503 Package Information: https://launchpad.net/ubuntu/+source/python-urllib3/1.25.8-2ubuntu0.2