puppet-tripleo before versions 5.5.0, 6.2.0 is vulnerable to an access-control flaw in the IPtables rules management, which allowed the cre…

published 2018-04-23 8 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10403

cvss: 7.1; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

puppet-tripleo before versions 5.5.0, 6.2.0 is vulnerable to an access-control flaw in the IPtables rules management, which allowed the creation of TCP/UDP rules with empty port values. If SSL is enabled, a malicious user could use these open ports to gain access to unauthorized resources.

Patch / fix

distros 1

puppet-tripleo openstack 10 5.4.0-4.el7ost

red hat advisories RHSA-2017:0025

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9599 updated 2026-06-30 cvss 7.1

puppet-tripleo: if ssl is enabled, traffic is open on both undercloud and overcloud

Red Hat OpenStack Platform 10.0 puppet-tripleo 5.4.0-4.el7ost
fixed: vendor fix RHSA-2017:0025
Red Hat OpenStack Platform 11 (Ocata) puppet-tripleo
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.82% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.1	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.0	AV:N/AC:M/Au:S/C:P/I:P/A:P

Affected products

unspecified puppet-tripleo

Classification

Weakness

CWE-284 Improper Access Control

References

rhn.redhat.com /errata/RHSA-2017-0025.html
vendor-advisory, third-party-advisory
bugzilla.redhat.com /show_bug.cgi?id=CVE-2016-9599
issue-tracking, third-party-advisory

Sources

CVE List CVE-2016-9599
NVD CVE-2016-9599

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary