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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2018-09-19T16:00:00

Updated: 2024-08-05T10:47:03.745Z

Reserved: 2018-09-19T00:00:00

Link: CVE-2018-17205

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-09-19T16:29:01.003

Modified: 2024-11-21T03:54:05.487

Link: CVE-2018-17205

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-09-25T00:00:00Z

Links: CVE-2018-17205 - Bugzilla