{"id":"USN-5083-1","summary":"python3.4, python3.5 vulnerabilities","details":"It was discovered that Python incorrectly handled certain RFCs.\nAn attacker could possibly use this issue to cause a denial of service.\nThis issue only affected Ubuntu 16.04 ESM. (CVE-2021-3733)\n\nIt was discovered that Python incorrectly handled certain\nserver responses. An attacker could possibly use this issue to\ncause a denial of service. (CVE-2021-3737)\n","modified":"2026-02-10T04:42:19Z","published":"2021-09-16T17:27:34Z","related":["UBUNTU-CVE-2021-3733","UBUNTU-CVE-2021-3737"],"upstream":["CVE-2021-3733","CVE-2021-3737","UBUNTU-CVE-2021-3733","UBUNTU-CVE-2021-3737"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5083-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3733"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3737"}],"affected":[{"package":{"name":"python3.4","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python3.4@3.4.3-1ubuntu1~14.04.7+esm11?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.3-1ubuntu1~14.04.7+esm11"}]}],"versions":["3.4~b1-0ubuntu3","3.4~b1-4ubuntu4","3.4~b1-4ubuntu6","3.4~b1-5ubuntu2","3.4~b2-1","3.4~b3-1ubuntu1","3.4~rc1-1build1","3.4~rc2-1","3.4~rc3-0ubuntu1","3.4.0-1","3.4.0-2ubuntu1","3.4.0-2ubuntu1.1","3.4.3-1ubuntu1~14.04.1","3.4.3-1ubuntu1~14.04.3","3.4.3-1ubuntu1~14.04.4","3.4.3-1ubuntu1~14.04.5","3.4.3-1ubuntu1~14.04.6","3.4.3-1ubuntu1~14.04.7","3.4.3-1ubuntu1~14.04.7+esm2","3.4.3-1ubuntu1~14.04.7+esm4","3.4.3-1ubuntu1~14.04.7+esm6","3.4.3-1ubuntu1~14.04.7+esm7","3.4.3-1ubuntu1~14.04.7+esm8","3.4.3-1ubuntu1~14.04.7+esm10"],"ecosystem_specific":{"binaries":[{"binary_name":"idle-python3.4","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"libpython3.4","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"libpython3.4-dev","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"libpython3.4-minimal","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"libpython3.4-stdlib","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"libpython3.4-testsuite","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"python3.4","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"python3.4-dev","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"python3.4-examples","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"python3.4-minimal","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"},{"binary_name":"python3.4-venv","binary_version":"3.4.3-1ubuntu1~14.04.7+esm11"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5083-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-3733"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-3737"}]}}},{"package":{"name":"python3.5","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/python3.5@3.5.2-2ubuntu0~16.04.13+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.2-2ubuntu0~16.04.13+esm1"}]}],"versions":["3.5.0-3","3.5.0-3ubuntu1","3.5.1~rc1-2ubuntu1","3.5.1-1","3.5.1-2","3.5.1-3","3.5.1-5","3.5.1-6ubuntu1","3.5.1-6ubuntu2","3.5.1-9ubuntu1","3.5.1-10","3.5.2-2~16.01","3.5.2-2~16.04","3.5.2-2ubuntu0~16.04.1","3.5.2-2ubuntu0~16.04.2","3.5.2-2ubuntu0~16.04.3","3.5.2-2ubuntu0~16.04.4","3.5.2-2ubuntu0~16.04.5","3.5.2-2ubuntu0~16.04.8","3.5.2-2ubuntu0~16.04.9","3.5.2-2ubuntu0~16.04.10","3.5.2-2ubuntu0~16.04.11","3.5.2-2ubuntu0~16.04.12","3.5.2-2ubuntu0~16.04.13"],"ecosystem_specific":{"binaries":[{"binary_name":"idle-python3.5","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"libpython3.5","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"libpython3.5-dev","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"libpython3.5-minimal","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"libpython3.5-stdlib","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"libpython3.5-testsuite","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"python3.5","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"python3.5-dev","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"python3.5-examples","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"python3.5-minimal","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"},{"binary_name":"python3.5-venv","binary_version":"3.5.2-2ubuntu0~16.04.13+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5083-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-3733"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-3737"}]}}}],"schema_version":"1.7.3"}