{"id":"UBUNTU-CVE-2018-17204","details":"An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting parse_group_prop_ntr_selection_method in lib/ofp-util.c. When decoding a group mod, it validates the group type and command after the whole group mod has been decoded. The OF1.5 decoder, however, tries to use the type and command earlier, when it might still be invalid. This causes an assertion failure (via OVS_NOT_REACHED). ovs-vswitchd does not enable support for OpenFlow 1.5 by default.","modified":"2026-01-30T02:38:45.791126Z","published":"2018-09-19T00:00:00Z","related":["USN-3873-1"],"upstream":["CVE-2018-17204"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-17204"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3873-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-17204"}],"affected":[{"package":{"name":"openvswitch","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/openvswitch@2.5.5-0ubuntu0.16.04.2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.5-0ubuntu0.16.04.2"}]}],"versions":["2.4.0-0ubuntu4","2.4.0-0ubuntu5","2.5.0~git20160129.46a88d9-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu1","2.5.0~git20160219.522aca6-0ubuntu2","2.5.0~git20160219.522aca6-0ubuntu3","2.5.0-0ubuntu1","2.5.2-0ubuntu0.16.04.1","2.5.2-0ubuntu0.16.04.2","2.5.2-0ubuntu0.16.04.3","2.5.4-0ubuntu0.16.04.1","2.5.5-0ubuntu0.16.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-common"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-ipsec"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-pki"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-switch"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-switch-dpdk"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-test"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-testcontroller"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"openvswitch-vtep"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"ovn-central"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"ovn-common"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"ovn-docker"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"ovn-host"},{"binary_version":"2.5.5-0ubuntu0.16.04.2","binary_name":"python-openvswitch"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-17204.json"}},{"package":{"name":"openvswitch","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/openvswitch@2.9.2-0ubuntu0.18.04.3?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.2-0ubuntu0.18.04.3"}]}],"versions":["2.8.0-0ubuntu2","2.8.1-0ubuntu2","2.8.1-0ubuntu3","2.9.0~git20180205.5a39582ca-0ubuntu1","2.9.0-0ubuntu1","2.9.2-0ubuntu0.18.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-common"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-pki"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-switch"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-switch-dpdk"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-test"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-testcontroller"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"openvswitch-vtep"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"ovn-central"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"ovn-common"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"ovn-controller-vtep"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"ovn-docker"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"ovn-host"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"python-openvswitch"},{"binary_version":"2.9.2-0ubuntu0.18.04.3","binary_name":"python3-openvswitch"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-17204.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}