Bug 1833220 (CVE-2020-10749)
| Summary: | CVE-2020-10749 containernetworking/plugins: IPv6 router advertisements allow for MitM attacks on IPv4 clusters | ||
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| Product: | [Other] Security Response | Reporter: | Sam Fowler <sfowler> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | aos-bugs, bbennett, bmontgom, cdc, cnv-qe-bugs, danw, dcbw, dominik.mierzejewski, dosmith, eparis, fdeutsch, go-sig, jbrooks, jburrell, jnovy, joelsmith, jokerman, lsm5, mcambria, mtleilia, nstielau, phoracek, rh.container.bot, security-response-team, sfowler, sgott, sponnaga, zebob.m |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | containernetworking/plugins 0.8.6 | Doc Type: | If docs needed, set a value |
| Doc 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 “rogue” IPv6 router advertisements to the host or other containers, to redirect traffic to the malicious container.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-06-17 23:20:58 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1842336, 1837209, 1837779, 1837780, 1837781, 1837782, 1840464, 1840465, 1841607, 1842334, 1842335, 1842337, 1842391, 1842392, 1842393, 1842693, 1842694, 1842927, 1842928, 1842944 | ||
| Bug Blocks: | 1833165 | ||
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Description
Sam Fowler
2020-05-08 05:39:41 UTC
*** Bug 1833219 has been marked as a duplicate of this bug. *** *** Bug 1833215 has been marked as a duplicate of this bug. *** Upstream Fix: https://github.com/containernetworking/plugins/pull/484 Acknowledgments: Name: the Kubernetes Product Security Committee Upstream: Etienne Champetier Mitigation: Prevent untrusted, non-privileged containers from running with CAP_NET_RAW. Upstream patch for this issue: https://github.com/containernetworking/plugins/pull/484/commits/219eb9e0464761c47383d239aba206da695e1a43 External References: https://groups.google.com/forum/#!topic/kubernetes-security-announce/BMb_6ICCfp8 Created containernetworking-plugins tracking bugs for this issue: Affects: fedora-all [bug 1842693] Created golang-github-containernetworking-plugins tracking bugs for this issue: Affects: fedora-all [bug 1842694] This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.3 Via RHSA-2020:2443 https://access.redhat.com/errata/RHSA-2020:2443 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.4 Via RHSA-2020:2403 https://access.redhat.com/errata/RHSA-2020:2403 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-10749 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Extras Via RHSA-2020:2684 https://access.redhat.com/errata/RHSA-2020:2684 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.2 Via RHSA-2020:2592 https://access.redhat.com/errata/RHSA-2020:2592 This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.5 Via RHSA-2020:2412 https://access.redhat.com/errata/RHSA-2020:2412 This issue has been addressed in the following products: RHEL-8-CNV-2.4 RHEL-7-CNV-2.4 Via RHSA-2020:3194 https://access.redhat.com/errata/RHSA-2020:3194 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:4694 https://access.redhat.com/errata/RHSA-2020:4694 It can be verified on an OCP 3.11 cluster that IPv6 traffic is not forwarded with a command like below: $ ovs-ofctl -O OpenFlow13 dump-flows br0 | grep ipv6 $ OpenShift SDN uses an OVS bridge which does not forward any packets that are not explicitly configured. There are no "ipv6" rules, therefore no "ipv6" traffic is forwarded. http://www.openvswitch.org/support/dist-docs/ovs-fields.7.txt Statement: 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. IPv6 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. This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.7 Via RHSA-2020:5633 https://access.redhat.com/errata/RHSA-2020:5633 |