========================================================================== Ubuntu Security Notice USN-5083-1 September 16, 2021 python3.4, python3.5 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in Python. Software Description: - python3.5: An interactive high-level object-oriented language - python3.4: An interactive high-level object-oriented language Details: It was discovered that Python incorrectly handled certain RFCs. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 ESM. (CVE-2021-3733) It was discovered that Python incorrectly handled certain server responses. An attacker could possibly use this issue to cause a denial of service. (CVE-2021-3737) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 ESM: python3.5 3.5.2-2ubuntu0~16.04.13+esm1 python3.5-minimal 3.5.2-2ubuntu0~16.04.13+esm1 Ubuntu 14.04 ESM: python3.4 3.4.3-1ubuntu1~14.04.7+esm11 python3.4-minimal 3.4.3-1ubuntu1~14.04.7+esm11 In general, a standard system update will make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5083-1 CVE-2021-3733, CVE-2021-3737