python2.7: An interactive high-level object-oriented language Details: USN-4754-1 fixed vulnerabilities in Python. Because of a regression, a subsequent update removed the fix for CVE-2021-3177. This update reinstates the security fix for CVE-2021-3177. We apologize for the inconvenience. Original advisory Python could be made to execute arbitrary code or denial of service if it received a specially crafted input.