CVE-2017-7543

MEDIUM
5.3
CVSS Score
Published: July 26, 2018 at 02:00 PM UTC
Updated: June 17, 2026 at 01:24 AM UTC
3 products affected across 2 vendorsOpenStackNeutronEnterprise Linux

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

10.0.0 ≤ v < 10.0.2-1.17.0.0 ≤ v < 7.2.0-12.18.0.0 ≤ v < 8.3.0-11.19.0.0 ≤ v < 9.3.1-2.1
Affected range stops below 10.0.2-1.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.2.0-12.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.3.0-11.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.3.1-2.1, so it looks safe — our inference, not a vendor statement
All versions

References (8)

VDB Entryx_refsource_BIDThird Party Advisory
http://www.securityfocus.com/bid/100237
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2447
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2448
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2449
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2450
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2451
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2017:2452
x_refsource_CONFIRMIssue TrackingMitigationThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7543

CVSS

5.3MEDIUMredhat
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362

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