Vulnerability in OpenStack Neutron
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 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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.018 (78.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.018 · change: -0.000
Affected products
- OpenStack Neutron
- Red Hat Openstack-Neutron — versions openstack-neutron-8.3.0-11.1, openstack-neutron-10.0.2-1.1, openstack-neutron-7.2.0-12.1
- Red Hat Enterprise Linux — versions 7.0
- Red Hat OpenStack — versions 6.0, 7.0, 8
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Mitigation, Issue Tracking)
- access.redhat.com/errata/RHSA-2017:2447 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2451 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2450 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2448 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/100237 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:2452 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2449 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7543?
- CVE-2017-7543 is a medium-severity vulnerability in OpenStack Neutron, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.3/10. Published 2018-07-26.
- How severe is CVE-2017-7543?
- Medium severity. CVSS v3 base score is 5.3 out of 10.