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CVE-2019-9735

24
FAUCET Score

CVE-2019-9735 is a medium-severity vulnerability (CVSS 6.5) in OpenStack Neutron's iptables firewall module, affecting versions before 10.0.8, 11.0.7, 12.0.6, and 13.0.3. An authenticated user can disrupt security group rule application for instances on compute hosts by configuring a security group rule with a destination port for a protocol that doesn't support it, such as VRRP. This denial-of-service attack is easily exploitable over the network with low privileges. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 10.0.8CPE matchmatch criteria
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
>= 11.0.0, < 11.0.7CPE matchmatch criteria
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
>= 12.0.0, < 12.0.6CPE matchmatch criteria
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
>= 13.0.0, < 13.0.3CPE matchmatch criteria
cpe:2.3:a:openstack:neutron:*:*:*:*:*:*:*:*
10CPE matchmatch criteria
cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.64%
Probability of exploitation in next 30 days
EPSS Percentile
88.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0364 is in the 96th percentile among its peer group of 21,957 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

pippatch availablevia ghsa
Product: neutronFixed in: 10.0.8
pippatch availablevia ghsa
Product: neutronFixed in: 11.0.7
pippatch availablevia ghsa
Product: neutronFixed in: 12.0.6
pippatch availablevia ghsa
Product: neutronFixed in: 13.0.3
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: openstack-neutron-1:12.0.5-11.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 14.0 (Rocky)Fixed in: openstack-neutron-1:13.0.3-0.20190313155649.00b63be.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: openstack-neutron-1:9.4.1-40.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: openstack-neutron-lbaas-1:9.2.2-8.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 10.0 (Newton)Fixed in: python-networking-bigswitch-2:9.42.14-1.el7ost
View patch
ubuntupatch availablevia nvd_reference
View patch

Vendor Advisories (2)

pipGHSA-9773-3fqg-8w25high

OpenStack Neutron's unsupported dport option prevents applying security groups

May 13, 2022
redhatCVE-2019-9735Important

openstack-neutron: incorrect validation of port settings in iptables security group driver

Mar 3, 2019

References

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