Kubernetes
CVE-2021-20218
HIGH
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Lifecycle Timeline
1Blast Radius
ecosystem impact- 13 maven packages depend on io.fabric8:kubernetes-client (8 direct, 5 indirect)
Ecosystem-wide dependent count for version 4.2.0.
DescriptionNVD
A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. This flaw allows a malicious pod/container to cause applications using the fabric8 kubernetes-client copy command to extract files outside the working path. The highest threat from this vulnerability is to integrity and system availability. This has been fixed in kubernetes-client-4.13.2 kubernetes-client-5.0.2 kubernetes-client-4.11.2 kubernetes-client-4.7.2
AnalysisAI
A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. This Path Traversal vulnerability could allow attackers to access files and directories outside the intended path.
Technical ContextAI
This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. A flaw was found in the fabric8 kubernetes-client in version 4.2.0 and after. This flaw allows a malicious pod/container to cause applications using the fabric8 kubernetes-client copy command to extract files outside the working path. The highest threat from this vulnerability is to integrity and system availability. This has been fixed in kubernetes-client-4.13.2 kubernetes-client-5.0.2 kubernetes-client-4.11.2 kubernetes-client-4.7.2 Affected products include: Redhat Kubernetes-Client, Redhat A-Mq Online, Redhat Build Of Quarkus, Redhat Codeready Studio, Redhat Descision Manager. Version information: version 4.2.0.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.
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Same weakness CWE-22 – Path Traversal
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External POC / Exploit Code
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