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Vulnerability record · CVE-2019-9735 · published 13 March 2019

CVE-2019-9735: Openstack neutron vulnerability

Openstack · Neutron

An issue was discovered in the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By setting a destination port in a security group rule along with a protocol that doesn't support that option (for example, VRRP), an authenticated user may block further application of security group rules for instances from any project/tenant on the compute hosts to which it's applied. (Only deployments using the iptables security group driver are affected.)

6.5 CVSS 3.0 Medium EPSS 3.7% · top 10.1% CWE-755 · CWE-755
6.5CVSS 3.0 base score, v2 4.0
3.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
20References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in the iptables firewall module in OpenStack Neutron before 10.0.8, 11.x before 11.0.7, 12.x before 12.0.6, and 13.x before 13.0.3. By setting a destination port in a security group rule along with a protocol that doesn't support that option (for example, VRRP), an authenticated user may block further application of security group rules for instances from any project/tenant on the compute hosts to which it's applied. (Only deployments using the iptables security group driver are affected.)

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2019/03/18/2 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/107390 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:0879 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0916 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0935 Third Party Advisory
https://launchpad.net/bugs/1818385 ExploitIssue TrackingPatchThird Party Advisory
https://seclists.org/bugtraq/2019/Mar/24 Mailing ListThird Party Advisory
https://security.openstack.org/ossa/OSSA-2019-001.html PatchVendor Advisory
https://usn.ubuntu.com/4036-1/
https://www.debian.org/security/2019/dsa-4409 Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/03/18/2 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/107390 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2019:0879 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0916 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0935 Third Party Advisory
https://launchpad.net/bugs/1818385 ExploitIssue TrackingPatchThird Party Advisory
https://seclists.org/bugtraq/2019/Mar/24 Mailing ListThird Party Advisory
https://security.openstack.org/ossa/OSSA-2019-001.html PatchVendor Advisory
https://usn.ubuntu.com/4036-1/
https://www.debian.org/security/2019/dsa-4409 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-9735), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.