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 in Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)
2.7.6-8ubuntu0.6+esm10