{"id":"USN-4754-2","summary":"python2.7 regression","details":"USN-4754-1 fixed a vulnerability in Python. The fix for CVE-2021-3177 introduced a\nregression in Python 2.7. This update reverts the security fix pending further investigation.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that Python incorrectly handled certain inputs.\n An attacker could possibly use this issue to execute arbitrary code\n or cause a denial of service. (CVE-2020-27619, CVE-2021-3177)\n","modified":"2026-02-10T04:42:05Z","published":"2021-02-25T18:54:00Z","references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4754-2"},{"type":"REPORT","url":"https://launchpad.net/bugs/1916893"}],"affected":[{"package":{"name":"python2.7","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python2.7@2.7.6-8ubuntu0.6+esm9?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-8ubuntu0.6+esm9"}]}],"versions":["2.7.5-8ubuntu3","2.7.5-8ubuntu4","2.7.6-2","2.7.6-2ubuntu1","2.7.6-3","2.7.6-3ubuntu1","2.7.6-4","2.7.6-4ubuntu1","2.7.6-5","2.7.6-7","2.7.6-8","2.7.6-8ubuntu0.2","2.7.6-8ubuntu0.3","2.7.6-8ubuntu0.4","2.7.6-8ubuntu0.5","2.7.6-8ubuntu0.6+esm2","2.7.6-8ubuntu0.6+esm3","2.7.6-8ubuntu0.6+esm5","2.7.6-8ubuntu0.6+esm6","2.7.6-8ubuntu0.6+esm7","2.7.6-8ubuntu0.6+esm8"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"idle-python2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"libpython2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"libpython2.7-dev"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"libpython2.7-minimal"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"libpython2.7-stdlib"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"libpython2.7-testsuite"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"python2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"python2.7-dev"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"python2.7-examples"},{"binary_version":"2.7.6-8ubuntu0.6+esm9","binary_name":"python2.7-minimal"}],"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-4754-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"python2.7","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python2.7@2.7.12-1ubuntu0~16.04.16?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.12-1ubuntu0~16.04.16"}]}],"versions":["2.7.10-4ubuntu1","2.7.10-4ubuntu2","2.7.11-2","2.7.11-3","2.7.11-4","2.7.11-6","2.7.11-7","2.7.11-7ubuntu1","2.7.12-1~16.04","2.7.12-1ubuntu0~16.04.1","2.7.12-1ubuntu0~16.04.2","2.7.12-1ubuntu0~16.04.3","2.7.12-1ubuntu0~16.04.4","2.7.12-1ubuntu0~16.04.8","2.7.12-1ubuntu0~16.04.9","2.7.12-1ubuntu0~16.04.11","2.7.12-1ubuntu0~16.04.12","2.7.12-1ubuntu0~16.04.13","2.7.12-1ubuntu0~16.04.14"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"idle-python2.7"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"libpython2.7"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"libpython2.7-dev"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"libpython2.7-minimal"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"libpython2.7-stdlib"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"libpython2.7-testsuite"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"python2.7"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"python2.7-dev"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"python2.7-examples"},{"binary_version":"2.7.12-1ubuntu0~16.04.16","binary_name":"python2.7-minimal"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4754-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"python2.7","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python2.7@2.7.17-1~18.04ubuntu1.5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.17-1~18.04ubuntu1.5"}]}],"versions":["2.7.14-2ubuntu2","2.7.14-4","2.7.14-6","2.7.14-7","2.7.14-8","2.7.15~rc1-1","2.7.15~rc1-1ubuntu0.1","2.7.15-4ubuntu4~18.04","2.7.15-4ubuntu4~18.04.1","2.7.15-4ubuntu4~18.04.2","2.7.17-1~18.04","2.7.17-1~18.04ubuntu1","2.7.17-1~18.04ubuntu1.1","2.7.17-1~18.04ubuntu1.2","2.7.17-1~18.04ubuntu1.3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"idle-python2.7"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"libpython2.7"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"libpython2.7-dev"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"libpython2.7-minimal"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"libpython2.7-stdlib"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"libpython2.7-testsuite"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"python2.7"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"python2.7-dev"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"python2.7-examples"},{"binary_version":"2.7.17-1~18.04ubuntu1.5","binary_name":"python2.7-minimal"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4754-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:18.04:LTS"}}}],"schema_version":"1.7.3"}