CVE-2019-9735

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.)

How to fix CVE-2019-9735

To remediate CVE-2019-9735, upgrade the affected package to a fixed version below.

• —upgrade to 2:13.0.2-13 or later
• —upgrade to 2:9.1.1-3+deb9u1 or later
• —upgrade to 10.0.8 or later
• —upgrade to 12.0.6 or later

Is CVE-2019-9735 being exploited?

Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 2:13.0.2-13
• from 0, < 2:9.1.1-3+deb9u1
• from 0, < 10.0.8
• >= 12.0.0, < 12.0.6, >= 13.0.0, < 13.0.3, >= 11.0.0, < 11.0.7, from 0, < 10.0.8

CVSS scores

References (17)

• ADVISORYgithub.com/advisories/GHSA-9773-3fqg-8w25
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2019-9735
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-9735
• PATCHgithub.com/openstack/neutron
• WEB