What’s Vulnerable › Vulnerabilities

CVE-2019-9735

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-03-13 · updated 2026-06-17
• Weakness: CWE-755

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.)

Affected products

• Debian Linux: 9.0
• OpenStack Neutron: before 10.0.8; from 11.0.0 before 11.0.7; from 12.0.0 before 12.0.6; from 13.0.0 before 13.0.3 — fixed in 10.0.8, 11.0.7, 12.0.6, 13.0.3
• OpenStack: 10, 13, 14

How to fix

Upgrade to a fixed version: OpenStack Neutron 10.0.8, 11.0.7, 12.0.6, 13.0.3. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2019/03/18/2
• http://www.securityfocus.com/bid/107390
• https://access.redhat.com/errata/RHSA-2019:0879
• https://access.redhat.com/errata/RHSA-2019:0916
• https://access.redhat.com/errata/RHSA-2019:0935
• https://launchpad.net/bugs/1818385
• https://seclists.org/bugtraq/2019/Mar/24
• https://security.openstack.org/ossa/OSSA-2019-001.html
• https://usn.ubuntu.com/4036-1/
• https://www.debian.org/security/2019/dsa-4409
• http://www.openwall.com/lists/oss-security/2019/03/18/2
• http://www.securityfocus.com/bid/107390

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