{"id":"UBUNTU-CVE-2017-13721","details":"In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.","modified":"2026-04-22T11:14:20.092337Z","published":"2017-10-09T00:00:00Z","related":["USN-3453-1"],"upstream":["CVE-2017-13721"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-13721"},{"type":"REPORT","url":"http://seclists.org/oss-sec/2017/q4/31"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3453-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-13721"}],"affected":[{"package":{"name":"xorg-server","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.15.1-0ubuntu2.10?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.15.1-0ubuntu2.10"}]}],"versions":["2:1.14.3-3ubuntu2","2:1.14.3-3ubuntu3","2:1.14.3-3ubuntu4","2:1.14.3-5ubuntu1","2:1.14.4-1ubuntu1","2:1.14.4-1ubuntu2","2:1.14.4.901-0ubuntu2","2:1.14.5-1ubuntu2","2:1.14.5-1ubuntu4","2:1.15.0-1ubuntu1","2:1.15.0-1ubuntu2","2:1.15.0-1ubuntu3","2:1.15.0-1ubuntu4","2:1.15.0-1ubuntu6","2:1.15.0-1ubuntu7","2:1.15.1-0ubuntu1","2:1.15.1-0ubuntu2","2:1.15.1-0ubuntu2.1","2:1.15.1-0ubuntu2.4","2:1.15.1-0ubuntu2.5","2:1.15.1-0ubuntu2.6","2:1.15.1-0ubuntu2.7","2:1.15.1-0ubuntu2.9"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xdmx"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xdmx-tools"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xnest"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xorg-server-source"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xserver-common"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xserver-xephyr"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xserver-xorg-core"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xserver-xorg-xmir"},{"binary_version":"2:1.15.1-0ubuntu2.10","binary_name":"xvfb"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-13721.json"}},{"package":{"name":"xorg-server-lts-xenial","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/xorg-server-lts-xenial@2:1.18.3-1ubuntu2.3~trusty3?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.18.3-1ubuntu2.3~trusty3"}]}],"versions":["2:1.18.3-1ubuntu2.2~trusty1","2:1.18.3-1ubuntu2.2~trusty2","2:1.18.3-1ubuntu2.2~trusty3","2:1.18.3-1ubuntu2.3~trusty1","2:1.18.3-1ubuntu2.3~trusty2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.18.3-1ubuntu2.3~trusty3","binary_name":"xorg-server-source-lts-xenial"},{"binary_version":"2:1.18.3-1ubuntu2.3~trusty3","binary_name":"xserver-xephyr-lts-xenial"},{"binary_version":"2:1.18.3-1ubuntu2.3~trusty3","binary_name":"xserver-xorg-core-lts-xenial"},{"binary_version":"2:1.18.3-1ubuntu2.3~trusty3","binary_name":"xserver-xorg-dev-lts-xenial"},{"binary_version":"2:1.18.3-1ubuntu2.3~trusty3","binary_name":"xwayland-lts-xenial"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-13721.json"}},{"package":{"name":"xorg-server","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xorg-server@2:1.18.4-0ubuntu0.6?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.18.4-0ubuntu0.6"}]}],"versions":["2:1.17.2-1ubuntu9","2:1.17.2-1ubuntu10","2:1.17.3-2ubuntu1","2:1.17.3-2ubuntu2","2:1.17.3-2ubuntu3","2:1.17.3-2ubuntu4","2:1.18.1-1ubuntu3","2:1.18.1-1ubuntu4","2:1.18.3-1ubuntu1","2:1.18.3-1ubuntu2","2:1.18.3-1ubuntu2.2","2:1.18.3-1ubuntu2.3","2:1.18.4-0ubuntu0.1","2:1.18.4-0ubuntu0.2","2:1.18.4-0ubuntu0.3","2:1.18.4-0ubuntu0.4"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xdmx"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xdmx-tools"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xmir"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xnest"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xorg-server-source"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xserver-common"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xserver-xephyr"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xserver-xorg-core"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xserver-xorg-legacy"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xserver-xorg-xmir"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xvfb"},{"binary_version":"2:1.18.4-0ubuntu0.6","binary_name":"xwayland"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-13721.json"}},{"package":{"name":"xorg-server-hwe-16.04","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/xorg-server-hwe-16.04@2:1.19.3-1ubuntu1~16.04.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.19.3-1ubuntu1~16.04.3"}]}],"versions":["2:1.18.4-1ubuntu6.1~16.04.1","2:1.18.4-1ubuntu6.1~16.04.2","2:1.19.3-1ubuntu1~16.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xmir-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xorg-server-source-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xserver-xephyr-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xserver-xorg-core-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xserver-xorg-dev-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xserver-xorg-legacy-hwe-16.04"},{"binary_version":"2:1.19.3-1ubuntu1~16.04.3","binary_name":"xwayland-hwe-16.04"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-13721.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}