Description
In Kura versions <= 5.6.2, `CommandCloudApp.execute()` extracts a caller-supplied ZIP archive into a caller-supplied directory inside the Kura JVM process before dispatching the command to the executor service. On a packaged Kura installation the JVM runs as `kurad` with `CAP_DAC_OVERRIDE`, while the configurable "Unprivileged" executor drops to the `kura` user via `su`.
A caller with permissions `rest.command` who is intentionally restricted to unprivileged command execution (`privileged.command.service.enable=false`, the default) can therefore set `workingDirectory` to `/` and use the ZIP body to write or overwrite arbitrary files on the device as `kurad`, completely bypassing the unprivileged sandbox the operator selected.
The command service is disabled by default since Kura 4.0.0 [1]. The issue does not apply when the command service is disabled.
[1] https://github.com/eclipse-kura/kura/blob/f9f969231892769a269876b23f19fa0e8173e3df/kura/distrib/RELEASE_NOTES.txt#L94
A caller with permissions `rest.command` who is intentionally restricted to unprivileged command execution (`privileged.command.service.enable=false`, the default) can therefore set `workingDirectory` to `/` and use the ZIP body to write or overwrite arbitrary files on the device as `kurad`, completely bypassing the unprivileged sandbox the operator selected.
The command service is disabled by default since Kura 4.0.0 [1]. The issue does not apply when the command service is disabled.
[1] https://github.com/eclipse-kura/kura/blob/f9f969231892769a269876b23f19fa0e8173e3df/kura/distrib/RELEASE_NOTES.txt#L94
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References
History
Tue, 10 Nov 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In Kura versions <= 5.6.2, `CommandCloudApp.execute()` extracts a caller-supplied ZIP archive into a caller-supplied directory inside the Kura JVM process before dispatching the command to the executor service. On a packaged Kura installation the JVM runs as `kurad` with `CAP_DAC_OVERRIDE`, while the configurable "Unprivileged" executor drops to the `kura` user via `su`. A caller with permissions `rest.command` who is intentionally restricted to unprivileged command execution (`privileged.command.service.enable=false`, the default) can therefore set `workingDirectory` to `/` and use the ZIP body to write or overwrite arbitrary files on the device as `kurad`, completely bypassing the unprivileged sandbox the operator selected. The command service is disabled by default since Kura 4.0.0 [1]. The issue does not apply when the command service is disabled. [1] https://github.com/eclipse-kura/kura/blob/f9f969231892769a269876b23f19fa0e8173e3df/kura/distrib/RELEASE_NOTES.txt#L94 | |
| Weaknesses | CWE-269 CWE-73 |
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| References |
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| Metrics |
cvssV4_0
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Subscriptions
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Status: PUBLISHED
Assigner: eclipse
Published:
Updated: 2026-11-10T17:06:10.888Z
Reserved: 2026-09-24T14:32:26.998Z
Link: CVE-2026-97401
No data.
Status : Received
Published: 2026-11-10T17:17:55.450
Modified: 2026-11-10T17:17:55.450
Link: CVE-2026-97401
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OpenCVE Enrichment
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