CVE-2017-7543
The race was only triggered by an update, at which point an attacker could access exposed tenant VMs and network resources.
Does this matter?
Lower severity and a low EPSS score (1.86%). Track it; it rarely justifies an emergency change on its own.
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 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.86% probability · 78th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- openstack/neutron · redhat/openstack
- Source
- secalert@redhat.com
References
- http://www.securityfocus.com/bid/100237Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2447Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2448Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2449Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2450Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2451Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2452Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543Issue Tracking, Mitigation, Third Party Advisory
- http://www.securityfocus.com/bid/100237Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:2447Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2448Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2449Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2450Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2451Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2452Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543Issue Tracking, Mitigation, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.