CVE-2017-7543
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…
- 5.3MediumCVSS base score
- 1.8%Exploitation in 30 daysEPSS · top 21% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 16 months later
· 16 months later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.8% · top 21% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected openstack-neutron-10.0.2-1.1
- affected openstack-neutron-8.3.0-11.1
- affected openstack-neutron-9.3.1-2.1
- affected openstack-neutron-7.2.0-12.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIneutronGHSA-hvxr-2fvv-c3wq (opens in a new tab)
References
8
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:2447 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:2451 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:2450 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:2448 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 100237 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2017:2452 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:2449 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-4222 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-hvxr-2fvv-c3wq (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-7543)Record last updated .