5.9

CVE-2017-7543: openstack neutron Race Condition

CVSS: 5.9v3.0MediumModified
AliasesGHSA-hvxr-2fvv-c3wqPYSEC-2026-686RHSA-2017:2447
Published 26-07-2018Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2017-7543 is a medium (CVSS 5.9) Race Condition vulnerability in openstack neutron. EPSS estimates a 1.84% chance of exploitation in the next 30 days, higher than 78.6% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.0 (NVD)
EPSS score
1.84%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-07-2018
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x before 8.3.0-11.1, 9.x before 9.3.1-2.1, and 10.x before 10.0.2-1.1, where, following a minor overcloud update, neutron security groups were disabled. Specifically, the following were reset to 0: net.bridge.bridge-nf-call-ip6tables and net.bridge.bridge-nf-call-iptables. The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.84%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

-0.02 pp

From 1.86% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.84%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat33 products
  • openstack6.0 | 7.0 | 8 | 9 | 10 | 11
  • openstack-neutron< 1:8.3.0-11.1.el7ost | < 1:9.3.1-2.1.el7ost | < 1:10.0.2-1.1.el7ost | < 0:2015.1.4-16.1.el7ost | < 1:7.2.0-12.1.el7ost | < 0:2014.2.3-42.el7ost
  • openstack-neutron-bgp-dragent< 1:8.3.0-11.1.el7ost
  • openstack-neutron-bigswitch< 0:2015.1.4-16.1.el7ost | < 1:7.2.0-12.1.el7ost | < 0:2014.2.3-42.el7ost
  • openstack-neutron-brocade< 0:2015.1.4-16.1.el7ost | < 1:7.2.0-12.1.el7ost | < 0:2014.2.3-42.el7ost
Openstack1 product
  • neutron≥ 7.0.0, < 7.2.0-12.1 | ≥ 8.0.0, < 8.3.0-11.1 | ≥ 9.0.0, < 9.3.1-2.1 | ≥ 10.0.0, < 10.0.2-1.1
PyPI1 product
  • neutron< 7.2.0-12.1 | ≥ 8.0.0, < 8.3.0-11.1 | ≥ 9.0.0, < 9.3.1-2.1 | ≥ 10.0.0, < 10.0.2-1.1
Red hat1 product
  • openstack-neutronopenstack-neutron-10.0.2-1.1 | openstack-neutron-8.3.0-11.1 | openstack-neutron-9.3.1-2.1 | openstack-neutron-7.2.0-12.1

4 vendors · 36 products

References

23 links
Show all 23 references