Vulnerability Name:

CVE-2019-9946 (CCN-158803)

Assigned:2019-03-28
Published:2019-03-28
Updated:2020-08-24
Summary:Cloud Native Computing Foundation (CNCF) CNI (Container Networking Interface) 0.7.4 has a network firewall misconfiguration which affects Kubernetes. The CNI 'portmap' plugin, used to setup HostPorts for CNI, inserts rules at the front of the iptables nat chains; which take precedence over the KUBE- SERVICES chain. Because of this, 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. The issue is fixed in CNI 0.7.5 and Kubernetes 1.11.9, 1.12.7, 1.13.5, and 1.14.0.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): None
Availibility (A): None
6.5 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L)
5.7 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-670
CWE-841
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-9946

Source: CCN
Type: IBM Security Bulletin 878460 (Cloud Private)
Multiple Security Vulnerabilities affect IBM Cloud Private Kubernetes

Source: CCN
Type: IBM Security Bulletin 879585 (Cloud Kubernetes Service)
IBM Cloud Kubernetes Service is affected by a CNI security vulnerability

Source: REDHAT
Type: UNKNOWN
RHBA-2019:0862

Source: CCN
Type: Kubernetes Web site
Security release of Kubernetes affecting certain network configurations with CNI - Releases 1.11.9, 1.12.7, 1.13.5, and 1.14.0 - CVE-2019-9946

Source: XF
Type: UNKNOWN
kubernetes-cve20199946-weak-security(158803)

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272

Source: CCN
Type: Kubernetes GIT Repository
build/gci: bump CNI version to 0.7.5 - CVE-2019-9946 #75455

Source: FEDORA
Type: UNKNOWN
FEDORA-2019-d2b57d3b19

Source: FEDORA
Type: UNKNOWN
FEDORA-2019-24217abfdf

Source: CONFIRM
Type: Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20190416-0002/

Source: CCN
Type: IBM Security Bulletin 882952 (API Connect)
API Connect V2018 is impacted by a security degradation vulnerability in Kubernetes (CVE-2019-9946)

Source: CCN
Type: IBM Security Bulletin 886609 (Cloud Private for Data)
IBM Cloud Private for Data is affected multiple security vulnerabilities in IBM Cloud Private Kubernetes

Source: CCN
Type: IBM Security Bulletin 1143454 (Watson Studio Local)
Multiple Vulnerabilities in Kubernetes affects IBM Watson Studio Local

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cncf:portmap:*:*:*:*:*:container_networking_interface:*:* (Version < 0.7.5)
  • OR cpe:/a:kubernetes:kubernetes:*:*:*:*:*:*:*:* (Version < 1.11.9)
  • OR cpe:/a:kubernetes:kubernetes:*:*:*:*:*:*:*:* (Version >= 1.12.0 and < 1.12.7)
  • OR cpe:/a:kubernetes:kubernetes:*:*:*:*:*:*:*:* (Version >= 1.13.0 and < 1.13.5)
  • OR cpe:/a:kubernetes:kubernetes:1.13.6:beta0:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:alpha0:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:alpha1:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:alpha2:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:alpha3:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:beta0:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:beta1:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:beta2:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:rc1:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:netapp:cloud_insights:-:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:kubernetes:kubernetes:1.11.0:-:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.12.0:-:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.13.0:-:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.11.1:-:*:*:*:*:*:*
  • OR cpe:/a:kubernetes:kubernetes:1.14.0:*:*:*:*:*:*:*
  • AND
  • cpe:/a:ibm:cloud_private:2.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:2018.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:3.1.0:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:3.1.1:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:3.1.2:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:api_connect:2018.4.1.4:*:*:*:*:*:*:*
  • OR cpe:/a:ibm:cloud_private:2.1.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112486
    P
    		k3s-1.21.3+k3s1-1.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:105981
    P
    		k3s-1.21.3+k3s1-1.2 on GA media (Moderate)
    2021-10-01
    oval:com.redhat.rhsa:def:20193403
    P
    		RHSA-2019:3403: container-tools:rhel8 security, bug fix, and enhancement update (Important)
    2019-11-05
    oval:com.ubuntu.cosmic:def:20199946000
    V
    		CVE-2019-9946 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-02
    oval:com.ubuntu.cosmic:def:201999460000000
    V
    		CVE-2019-9946 on Ubuntu 18.10 (cosmic) - medium.
    2019-04-02
    oval:com.ubuntu.disco:def:201999460000000
    V
    		CVE-2019-9946 on Ubuntu 19.04 (disco) - medium.
    2019-04-02
    BACK
    cncf portmap *
    kubernetes kubernetes *
    kubernetes kubernetes *
    kubernetes kubernetes *
    kubernetes kubernetes 1.13.6 beta0
    kubernetes kubernetes 1.14.0 alpha0
    kubernetes kubernetes 1.14.0 alpha1
    kubernetes kubernetes 1.14.0 alpha2
    kubernetes kubernetes 1.14.0 alpha3
    kubernetes kubernetes 1.14.0 beta0
    kubernetes kubernetes 1.14.0 beta1
    kubernetes kubernetes 1.14.0 beta2
    kubernetes kubernetes 1.14.0 rc1
    netapp cloud insights -
    kubernetes kubernetes 1.11.0 -
    kubernetes kubernetes 1.12.0 -
    kubernetes kubernetes 1.13.0 -
    kubernetes kubernetes 1.11.1 -
    kubernetes kubernetes 1.14.0
    ibm cloud private 2.1.0
    ibm api connect 2018.1.0
    ibm cloud private 3.1.0
    ibm cloud private 3.1.1
    ibm cloud private 3.1.2
    ibm api connect 2018.4.1.4
    ibm cloud private 2.1.0.0