| Revision Date: | 2018-09-19 | Version: | 1 | | Title: | CVE-2018-17205 on Ubuntu 16.04 LTS (xenial) - medium. | | Description: | An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting ofproto_rule_insert__ in ofproto/ofproto.c. During bundle commit, flows that are added in a bundle are applied to ofproto in order. If a flow cannot be added (e.g., the flow action is a go-to for a group id that does not exist), OvS tries to revert back all previous flows that were successfully applied from the same bundle. This is possible since OvS maintains list of old flows that were replaced by flows from the bundle. While reinserting old flows, OvS has an assertion failure due to a check on rule state != RULE_INITIALIZED. This would work for new flows, but for an old flow the rule state is RULE_REMOVED. The assertion failure causes an OvS crash.
| | Family: | unix | Class: | vulnerability | | Status: | | Reference(s): | CVE-2018-17205
| | Platform(s): | Ubuntu 16.04 LTS
| Product(s): | | | Definition Synopsis | | Ubuntu 16.04 LTS (xenial) is installed. AND Package Information
NOT openvswitch-common package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-ipsec package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-pki package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-switch package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-switch-dpdk package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-test package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-testcontroller package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT openvswitch-vtep package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT ovn-central package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT ovn-common package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT ovn-host package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
OR NOT python-openvswitch package in xenial, while related to the CVE in some way, is not affected (note: 'code not present').
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