CVE-2023-23939

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Summary

CVECVE-2023-23939
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-03-06 19:15:00 UTC
Updated2023-11-07 04:08:00 UTC
DescriptionAzure/setup-kubectl is a GitHub Action for installing Kubectl. This vulnerability only impacts versions before version 3. An insecure temporary creation of a file allows other actors on the Actions runner to replace the Kubectl binary created by this action because it is world writable. This Kubectl tool installer runs `fs.chmodSync(kubectlPath, 777)` to set permissions on the Kubectl binary, however, this allows any local user to replace the Kubectl binary. This allows privilege escalation to the user that can also run kubectl, most likely root. This attack is only possible if an attacker somehow breached the GitHub actions runner or if a user is utilizing an Action that maliciously executes this attack. This has been fixed and released in all versions `v3` and later. 775 permissions are used instead. Users are advised to upgrade. There are no known workarounds for this issue.

Risk And Classification

Problem Types: CWE-732

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Microsoft Azure Setup Kubectl All All All All

References

ReferenceSourceLinkTags
lower permissions for chmod (#51) · Azure/setup-kubectl@d449d75 · GitHub MISC github.com
Azure/setup-kubectl: Escalation of privilege vulnerability for v3 and lower · Advisory · Azure/setup-kubectl · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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