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TI-2018-12303 Aliases CVE-2018-17205GHSA-vxv4-rrx9-5xfq

An issue was discovered in Open vSwitch (OvS) 2.7.x through 2.7.6, affecting…

Priority LOW 38CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 5 fixed, 2 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-617.

Summary

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.

Why it matters now

EPSS 0.02531 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 3 advisoriesRed Hat: 5 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:*2.7.0 – 2.7.6VulnerableOpenvswitch
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*10VulnerableRed Hat
cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*13VulnerableRed Hat
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
  • cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* Versions 2.7.0 – 2.7.6 Vulnerable ·Openvswitch
  • cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* Versions 10 Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:* Versions 13 Vulnerable ·Red Hat
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical

Remediation

Red Hat 3 advisories

  • RHSA-2019:0081 Released 2019-01-16 · Red Hat rating Moderate
    openvswitch security and bug fix update
    • Red Hat OpenStack Platform 13.0 openvswitch-2.9.0-83.el7fdp.1, openvswitch-ovn-central-2.9.0-83.el7fdp.1, openvswitch-ovn-common-2.9.0-83.el7fdp.1 +4
  • RHSA-2019:0053 Released 2019-01-16 · Red Hat rating Moderate
    openvswitch security and bug fix update
    • OpenStack 10.0 Tools for RHEL 7 openvswitch-test-2.9.0-83.el7fdp.1
    • Red Hat OpenStack Platform 10.0 openvswitch-2.9.0-83.el7fdp.1, openvswitch-devel-2.9.0-83.el7fdp.1, openvswitch-ovn-central-2.9.0-83.el7fdp.1 +4
  • RHSA-2018:3500 Released 2018-11-05 · Red Hat rating Moderate
    openvswitch security, bug fix, and enhancement update
    • Fast Datapath for Red Hat Enterprise Linux 7 openvswitch-2.9.0-70.el7fdp.1, openvswitch-devel-2.9.0-70.el7fdp.1, openvswitch-ovn-central-2.9.0-70.el7fdp.1 +5
    • Red Hat Virtualization 4.2 Management Agent for RHEL 7.6 EUS Hosts openvswitch-2.9.0-70.el7fdp.1, openvswitch-devel-2.9.0-70.el7fdp.1, openvswitch-ovn-common-2.9.0-70.el7fdp.1 +2

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenStack Platform 12 (Pike)AffectedNo fix planned: Will not fix
Red Hat Virtualization 4AffectedNo fix yet
Fast Datapath for Red Hat Enterprise Linux 7Fixed RHSA-2018:3500
OpenStack 10.0 Tools for RHEL 7Fixed RHSA-2019:0053
Red Hat OpenStack Platform 10.0Fixed RHSA-2019:0053
Red Hat OpenStack Platform 13.0Fixed RHSA-2019:0081
Red Hat Virtualization 4.2 Management Agent for RHEL 7.6 EUS HostsFixed RHSA-2018:3500
Not affected: 10 products
  • Fast Datapath for RHEL 7
  • Fast Datapath for RHEL 8
  • Red Hat OpenShift Container Platform 3.2
  • Red Hat OpenShift Container Platform 3.3
  • Red Hat OpenShift Container Platform 3.4
  • Red Hat OpenShift Enterprise 3.0
  • Red Hat OpenShift Enterprise 3.1
  • Red Hat OpenStack Platform 14 (Rocky)
  • Red Hat OpenStack Platform 8 (Liberty)
  • Red Hat OpenStack Platform 9 (Mitaka)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-17205
  2. 2026-10-03 Alias added: GHSA-vxv4-rrx9-5xfq

References

Exploit 1

Advisory 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences