{"id":"UBUNTU-CVE-2019-18348","details":"An issue was discovered in urllib2 in Python 2.x through 2.7.17 and urllib in Python 3.x through 3.8.0. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the first argument to urllib.request.urlopen with \\r\\n (specifically in the host component of a URL) followed by an HTTP header. This is similar to the CVE-2019-9740 query string issue and the CVE-2019-9947 path string issue. (This is not exploitable when glibc has CVE-2016-10739 fixed.). This is fixed in: v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1; v3.6.11, v3.6.11rc1, v3.6.12; v3.7.8, v3.7.8rc1, v3.7.9; v3.8.3, v3.8.3rc1, v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1.","modified":"2026-04-22T12:14:03.487201Z","published":"2019-10-23T17:15:00Z","related":["USN-4333-1","USN-4333-2","USN-6891-1"],"upstream":["CVE-2019-18348"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-18348"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4333-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4333-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-18348"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6891-1"}],"affected":[{"package":{"name":"python2.7","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python2.7@2.7.6-8ubuntu0.6+esm5?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.7.6-8ubuntu0.6+esm5"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"idle-python2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"libpython2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"libpython2.7-minimal"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"libpython2.7-stdlib"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"libpython2.7-testsuite"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"python2.7"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"python2.7-examples"},{"binary_version":"2.7.6-8ubuntu0.6+esm5","binary_name":"python2.7-minimal"}],"availability":"Available 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with Ubuntu Pro (Infra-only): 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with Ubuntu Pro (Infra-only): 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