RHSA-2020:2684

Vulnerability from csaf_redhat - Published: 2020-06-23 14:27 - Updated: 2026-03-27 06:23
Summary
Red Hat Security Advisory: containernetworking-plugins security update
Severity
Moderate
Notes
Topic: An update for containernetworking-plugins is now available for Red Hat Enterprise Linux 7 Extras. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The Container Network Interface (CNI) project consists of a specification and libraries for writing plug-ins for configuring network interfaces in Linux containers, along with a number of supported plug-ins. CNI concerns itself only with network connectivity of containers and removing allocated resources when the container is deleted. Security Fix(es): * containernetworking/plugins: IPv6 router advertisements allow for MitM attacks on IPv4 clusters (CVE-2020-10749) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2020-10749

A vulnerability was found in affected container networking implementations that allow malicious containers in Kubernetes clusters to perform man-in-the-middle (MitM) attacks. A malicious container can exploit this flaw by sending “rogue” IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container.

6.0 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CWE-300 - Channel Accessible by Non-Endpoint
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2020:2684
Workaround Prevent untrusted, non-privileged containers from running with CAP_NET_RAW.
References
Acknowledgments
the Kubernetes Product Security Committee
Etienne Champetier
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  "vulnerabilities": [
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        {
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        {
          "category": "description",
          "text": "A vulnerability was found in affected container networking implementations that allow malicious containers in Kubernetes clusters to perform man-in-the-middle (MitM) attacks. A malicious container can exploit this flaw by sending \u201crogue\u201d IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container.",
          "title": "Vulnerability description"
        },
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          "text": "containernetworking/plugins: IPv6 router advertisements allow for MitM attacks on IPv4 clusters",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "In OpenShift Container Platform 4, the default network plugin, OpenShift SDN, and OVN Kubernetes, do not forward IPv6 traffic, making this vulnerability not exploitable. The affected code from containernetworking/plugins is however still included in these plugins, hence this vulnerability is rated Low for both OpenShift SDN and OVN-Kubernetes.\n\nIPv6 traffic is not forwarded by the OpenShift SDN in OpenShift Container Platform 3.11, making this vulnerability not exploitable. However, the affected code from containernetworking/plugins is still included in the atomic-openshift package, hence this vulnerability is rated Low for OpenShift Container Platform 3.11.",
          "title": "Statement"
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        {
          "category": "external",
          "summary": "https://groups.google.com/forum/#!topic/kubernetes-security-announce/BMb_6ICCfp8",
          "url": "https://groups.google.com/forum/#!topic/kubernetes-security-announce/BMb_6ICCfp8"
        }
      ],
      "release_date": "2020-06-01T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-06-23T14:27:26+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:2684"
        },
        {
          "category": "workaround",
          "details": "Prevent untrusted, non-privileged containers from running with CAP_NET_RAW.",
          "product_ids": [
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.0,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Server-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Server-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.src",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-0:0.8.3-3.el7_8.x86_64",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.ppc64le",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.s390x",
            "7Workstation-EXTRAS-7.8:containernetworking-plugins-debuginfo-0:0.8.3-3.el7_8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "containernetworking/plugins: IPv6 router advertisements allow for MitM attacks on IPv4 clusters"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.