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CVE-2017-7543

Published: 26 July 2018

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.

Notes

AuthorNote
mdeslaur
per Debian, this is a Red Hat specific packaging issue

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
neutron
Launchpad, Ubuntu, Debian
upstream Needs triage

precise Does not exist

trusty Does not exist
(trusty was not-affected)
xenial Not vulnerable

zesty Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N