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: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.5 6.5
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Access Vector Network Network
Access Complexity Low Low
Privileges Required None Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3 3
SUSE Bugzilla entry: 1104467 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise Server 12 SP3
SUSE Linux Enterprise Server for SAP Applications 12 SP3
  • openvswitch >= 2.7.6-3.23.1
Patchnames:
SUSE-SLE-SERVER-12-SP3-2018-2942


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Please note that this evaluation state might be work in progress, incomplete or outdated.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
HPE Helion OpenStack 8 openvswitch Released
SUSE Enterprise Storage 5 openvswitch Released
SUSE Linux Enterprise High Performance Computing 15 openvswitch Not affected
SUSE Linux Enterprise Module for Server Applications 15 openvswitch Not affected
SUSE Linux Enterprise Server 12 SP3 openvswitch Released
SUSE Linux Enterprise Server 12 SP3 BCL openvswitch Released
SUSE Linux Enterprise Server 12 SP3 ESPOS openvswitch Released
SUSE Linux Enterprise Server 12 SP3 LTSS openvswitch Released
SUSE Linux Enterprise Server 15 openvswitch Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 openvswitch Released
SUSE Linux Enterprise Server for SAP Applications 15 openvswitch Not affected
SUSE OpenStack Cloud 8 openvswitch Released
SUSE OpenStack Cloud Crowbar 8 openvswitch Released