CVE-2020-8558
Description
The Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the node's network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.18.5-1 |
| sid | Fixed | 1.18.5-1 |
| forky | Fixed | 1.18.5-1 |
| bullseye | Fixed | 1.18.5-1 |
| bookworm | Fixed | 1.18.5-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | k8s.io/kubernetes | >=1.18.0,<1.18.4 | 1.18.4 |
| Go | k8s.io/kubernetes | >=1.17.0,<1.17.7 | 1.17.7 |
| Go | k8s.io/kubernetes | <1.16.11 | 1.16.11 |
References
- https://www.suse.com/security/cve/CVE-2020-8558.html
- https://github.com/bottlerocket-os/bottlerocket/security/advisories/GHSA-wqv3-8cm6-h6wg
- https://nvd.nist.gov/vuln/detail/CVE-2020-8558
- https://github.com/kubernetes/kubernetes/issues/92315
- https://bugzilla.redhat.com/show_bug.cgi?id=1843358
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8558
- https://github.com/kubernetes/kubernetes
- https://github.com/tabbysable/POC-2020-8558
- https://groups.google.com/g/kubernetes-announce/c/sI4KmlH3S2I/m/TljjxOBvBQAJ
- https://groups.google.com/g/kubernetes-security-announce/c/B1VegbBDMTE
- https://labs.bishopfox.com/tech-blog/bad-pods-kubernetes-pod-privilege-escalation
- https://security.netapp.com/advisory/ntap-20200821-0001
- https://www.openwall.com/lists/oss-security/2020/07/08/1
- https://security-tracker.debian.org/tracker/CVE-2020-8558
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.