// For flags

CVE-2017-7543

openstack-neutron: iptables not active after update

Severity Score

5.9
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Se ha descubierto una condición de carrera en openstack-neutron en versiones anteriores a la 7.2.0-12.1, 8.x anteriores a la 8.3.0-11.1, 9.x anteriores a la 9.3.1-2.1 y 10.x anteriores a la 10.0.2-1.1, cuando, siguiendo a una actualización overcloud menor, los grupos de seguridad neutron estaban deshabilitados. De manera específica, lo siguiente se ha reiniciado a 0: net.bridge.bridge-nf-call-ip6tables y net.bridge.bridge-nf-call-iptables. La carrera solo se desencadenó con una actualización, en cuyo momento un atacante podía acceder a las máquinas virtuales de los inquilinos y a los recursos de red expuestos.

A race-condition flaw was discovered in openstack-neutron 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.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-04-05 CVE Reserved
  • 2017-08-08 CVE Published
  • 2024-05-10 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
6.0
Search vendor "Redhat" for product "Openstack" and version "6.0"
-
Affected
in Redhat
Search vendor "Redhat"
Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
7.0
Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"
-
Safe
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
7.0
Search vendor "Redhat" for product "Openstack" and version "7.0"
-
Affected
in Redhat
Search vendor "Redhat"
Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
7.0
Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"
-
Safe
Openstack
Search vendor "Openstack"
Neutron
Search vendor "Openstack" for product "Neutron"
>= 7.0.0 < 7.2.0-12.1
Search vendor "Openstack" for product "Neutron" and version " >= 7.0.0 < 7.2.0-12.1"
-
Affected
Openstack
Search vendor "Openstack"
Neutron
Search vendor "Openstack" for product "Neutron"
>= 8.0.0 < 8.3.0-11.1
Search vendor "Openstack" for product "Neutron" and version " >= 8.0.0 < 8.3.0-11.1"
-
Affected
Openstack
Search vendor "Openstack"
Neutron
Search vendor "Openstack" for product "Neutron"
>= 9.0.0 < 9.3.1-2.1
Search vendor "Openstack" for product "Neutron" and version " >= 9.0.0 < 9.3.1-2.1"
-
Affected
Openstack
Search vendor "Openstack"
Neutron
Search vendor "Openstack" for product "Neutron"
>= 10.0.0 < 10.0.2-1.1
Search vendor "Openstack" for product "Neutron" and version " >= 10.0.0 < 10.0.2-1.1"
-
Affected
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
8
Search vendor "Redhat" for product "Openstack" and version "8"
-
Affected
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
9
Search vendor "Redhat" for product "Openstack" and version "9"
-
Affected
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
10
Search vendor "Redhat" for product "Openstack" and version "10"
-
Affected
Redhat
Search vendor "Redhat"
Openstack
Search vendor "Redhat" for product "Openstack"
11
Search vendor "Redhat" for product "Openstack" and version "11"
-
Affected