CVE-2017-7543 - CVE House
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Status published Medium CVE-2017-7543

A race-condition flaw was discovered in openstack-neutron before 7.2.0-12.1, 8.x...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

openstack-neutron
Vulnerable Versions:
openstack-neutron-10.0.2-1.1, openstack-neutron-8.3.0-11.1, openstack-neutron-9.3.1-2.1, openstack-neutron-7.2.0-12.1

Timeline

Official Publish: July 26th, 2018
Last Modified: August 5th, 2024
Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-362

MITRE ATT&CK TTPs

T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1574 Hijack Execution Flow
Persistence
T1565 Data Manipulation
Impact
T1499 Endpoint Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access