Upstream information

CVE-2018-17205 at MITRE

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.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v3 Scores
  SUSE
Base Score 6.5
Vector AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Access Vector Network
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
SUSE Bugzilla entry: 1104467 [REOPENED]

No SUSE Security Announcements cross referenced.

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Server 12 SP3
  • openvswitch >= 2.7.6-3.23.1
  • openvswitch-debuginfo >= 2.7.6-3.23.1
  • openvswitch-debugsource >= 2.7.6-3.23.1
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • openvswitch >= 2.7.6-3.23.1
  • openvswitch-debuginfo >= 2.7.6-3.23.1
  • openvswitch-debugsource >= 2.7.6-3.23.1


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Module for Server Applications 15 GA openvswitch Not affected
SUSE Linux Enterprise Server 12 SP3 openvswitch In progress