{"id":"UBUNTU-CVE-2020-13956","details":"Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the library as java.net.URI object and pick the wrong target host for request execution.","modified":"2026-01-30T02:17:27.941708Z","published":"2020-12-02T17:15:00Z","related":["USN-5239-1"],"upstream":["CVE-2020-13956"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-13956"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1886587"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5239-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-13956"}],"affected":[{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client@4.3.3-1ubuntu0.1+esm2?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1ubuntu0.1+esm2"}]}],"versions":["4.2.5-2","4.3.2-1","4.3.3-1","4.3.3-1ubuntu0.1","4.3.3-1ubuntu0.1+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.3.3-1ubuntu0.1+esm2"},{"binary_version":"4.3.3-1ubuntu0.1+esm2","binary_name":"libhttpmime-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13956.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client@4.5.1-1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1-1ubuntu0.1~esm1"}]}],"versions":["4.4.1-1","4.5.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.5.1-1ubuntu0.1~esm1"},{"binary_name":"libhttpmime-java","binary_version":"4.5.1-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13956.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client@4.5.5-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.5-1ubuntu0.1~esm1"}]}],"versions":["4.5.3-1","4.5.4-1","4.5.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.5.5-1ubuntu0.1~esm1"},{"binary_name":"libhttpmime-java","binary_version":"4.5.5-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13956.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client@4.5.11-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.11-1ubuntu0.1~esm1"}]}],"versions":["4.5.9-1","4.5.10-2","4.5.11-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.5.11-1ubuntu0.1~esm1"},{"binary_name":"libhttpmime-java","binary_version":"4.5.11-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13956.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}