Vulnerability CVE-2017-7543


Published: 2018-07-26

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.

Type:

CWE-362

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Redhat -> Openstack 
Openstack -> Neutron 

 References:
http://www.securityfocus.com/bid/100237
https://access.redhat.com/errata/RHSA-2017:2447
https://access.redhat.com/errata/RHSA-2017:2448
https://access.redhat.com/errata/RHSA-2017:2449
https://access.redhat.com/errata/RHSA-2017:2450
https://access.redhat.com/errata/RHSA-2017:2451
https://access.redhat.com/errata/RHSA-2017:2452
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543

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