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Fencer Vulns
medium 4.2

CVE-2018-1002100 json

Kubernetes arbitrary file overwrite

published 2018-06-01 8 y ago modified 2026-06-17 4 mo ago also GHSA-2jq6-ffph-p4h8 , GO-2023-1959 , EUVD-2022-2004

cvss
4.2
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.7%
EPSS 1.7% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

In Kubernetes versions 1.5.x, 1.6.x, 1.7.x, 1.8.x, and prior to version 1.9.6, the kubectl cp command insecurely handles tar data returned from the container, and can be caused to overwrite arbitrary local files.

Patch / fix

  • go k8s.io/kubernetes 1.9.6
  • Kubernetes Kubernetes v1.9.6
  • kubernetes Debian 14, Debian 13, Debian 12 1.17.4-1

debian advisories DEBIAN-CVE-2018-1002100

  • cri-o openshift 3.9 1.9.12-1.gitfa11beb.el7
  • cri-tools openshift 3.9 1.0.0-5.rhaos3.9.git8e6013a.el7
  • atomic-openshift openshift 3.9 3.9.30-1.git.0.dec1ba7.el7
  • openshift-ansible openshift 3.9 3.9.30-1.git.7.46f8678.el7
  • atomic-openshift-pod openshift 3.9 3.9.30-1.git.0.dec1ba7.el7
  • atomic-openshift-node openshift 3.9 3.9.30-1.git.0.dec1ba7.el7
  • atomic-openshift-tests openshift 3.9 3.9.30-1.git.0.dec1ba7.el7
  • atomic-openshift-utils openshift 3.9 3.9.30-1.git.7.46f8678.el7

red hat advisories RHBA-2018:1796

  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250807T150727-1.1

opensuse advisories openSUSE-SU-2025:15424-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1002100 updated cvss 6.1

kubernetes: Kubectl copy doesn't check for paths outside of it's destination directory

  • Red Hat Enterprise Linux 7 kubernetes
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 3.9 cri-o 1.9.12-1.gitfa11beb.el7, cri-tools 1.0.0-5.rhaos3.9.git8e6013a.el7, atomic-openshift 3.9.30-1.git.0.dec1ba7.el7, openshift-ansible 3.9.30-1.git.7.46f8678.el7, atomic-openshift-pod 3.9.30-1.git.0.dec1ba7.el7, atomic-openshift-node 3.9.30-1.git.0.dec1ba7.el7, +20 more
    fixed: vendor fix RHBA-2018:1796
  • Red Hat OpenShift Container Platform 3.10 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more Red Hat OpenShift Container Platform 3.11 atomic-openshift, atomic-openshift-pod, atomic-openshift-node, atomic-openshift-tests, atomic-openshift-master, atomic-openshift-clients, +7 more Red Hat OpenShift Container Platform 4 openshift, openshift-clients, openshift-kubelet, openshift-hyperkube, openshift-kube-apiserver, openshift-kube-scheduler, +2 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 4.2 CVSS:3.0/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:H/A:N
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:N/I:P/A:P
GitHub 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
go k8s.io/kubernetes
>=1.5.0-alpha.0, <1.9.6
>=1.5.0, <1.9.6
1.9.6

Affected products

  • Kubernetes Kubernetes

Classification

Weakness
  • CWE-20 Improper Input Validation
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.