PT-2019-19952 · Linux Foundation+5 · Cni+6

Etienne Champetier · Published 2019-03-28 · Updated 2024-06-15 · CVE-2019-9946

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions CNI versions 0.7.4 and earlier Kubernetes versions prior to 1.11.9 Kubernetes versions prior to 1.12.7 Kubernetes versions prior to 1.13.5 Kubernetes versions prior to 1.14.0

Description The issue is related to a network firewall misconfiguration in the CNI 'portmap' plugin. This plugin is used to set up HostPorts for CNI and inserts rules at the front of the iptables nat chains, which take precedence over the KUBE-SERVICES chain. As a result, the HostPort/portmap rule could match incoming traffic even if there were better fitting, more specific service definition rules like NodePorts later in the chain.

Recommendations For CNI version 0.7.4, update to version 0.7.5 to resolve the issue. For Kubernetes versions prior to 1.11.9, update to version 1.11.9 or later. For Kubernetes versions prior to 1.12.7, update to version 1.12.7 or later. For Kubernetes versions prior to 1.13.5, update to version 1.13.5 or later. For Kubernetes versions prior to 1.14.0, update to version 1.14.0 or later.

Fix

Weakness Enumeration

CWE-670

Related Identifiers

ALSA-2019:3403

ALT-PU-2019-1540

CESA-2019_3403

CVE-2019-9946

OPENSUSE-SU-2024:10884-1

RHSA-2019:3403

RHSA-2019_3403

RLSA-2019:3403

Affected Products

Alt Linux

Almalinux

Cni

Centos

Kubernetes

Red Hat

Rocky Linux

References · 56

• https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272 · Patch
• https://linux.oracle.com/errata/ELSA-2019-4593.html · Vendor Advisory
• https://security.netapp.com/advisory/ntap-20190416-0002 · Patch
• https://security-tracker.debian.org/tracker/CVE-2019-9946 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10884-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-9946 · Security Note
• https://osv.dev/vulnerability/CVE-2019-9946 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-9946 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-9946 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2019:3403 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2019:3403 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-9946 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2019:3403 · Vendor Advisory
• https://access.redhat.com/errata/RHBA-2019:0862 · Vendor Advisory