{"id":"UBUNTU-CVE-2017-2625","details":"It was discovered that libXdmcp before 1.1.2 including used weak entropy to generate session keys. On a multi-user system using xdmcp, a local attacker could potentially use information available from the process list to brute force the key, allowing them to hijack other users' sessions.","modified":"2026-01-30T00:55:12.647775Z","published":"2018-07-27T18:29:00Z","related":["USN-5690-1"],"upstream":["CVE-2017-2625"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-2625"},{"type":"REPORT","url":"https://www.x41-dsec.de/lab/advisories/x41-2017-001-xorg/"},{"type":"REPORT","url":"http://openwall.com/lists/oss-security/2017/03/01/1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5690-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-2625"}],"affected":[{"package":{"name":"libxdmcp","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libxdmcp@1:1.1.1-1ubuntu0.1~esm1?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.1.1-1ubuntu0.1~esm1"}]}],"versions":["1:1.1.1-1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libxdmcp-dev","binary_version":"1:1.1.1-1ubuntu0.1~esm1"},{"binary_name":"libxdmcp6","binary_version":"1:1.1.1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-2625.json"}},{"package":{"name":"libxdmcp","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libxdmcp@1:1.1.2-1.1ubuntu0.1~esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.1.2-1.1ubuntu0.1~esm1"}]}],"versions":["1:1.1.2-1","1:1.1.2-1.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libxdmcp-dev","binary_version":"1:1.1.2-1.1ubuntu0.1~esm1"},{"binary_name":"libxdmcp6","binary_version":"1:1.1.2-1.1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-2625.json"}},{"package":{"name":"libxdmcp","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libxdmcp@1:1.1.2-3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.1.2-3"}]}],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libxdmcp-dev","binary_version":"1:1.1.2-3"},{"binary_name":"libxdmcp6","binary_version":"1:1.1.2-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-2625.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}