CVE-2021-4406: critical vulnerability in OSNEXUS QuantaStor
Authenticated Remote COmmand Execution as root in OSNEXUS QuantaStor version 6.0.0.355 and others
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 1.0%
An authenticated attacker is able to create alerts that trigger a stored XSS attack.
POC
* go to the alert manager
* open the ITSM tab
* add a webhook with the URL/service token value
' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters)
* click add
* click apply
* create a test alert
* The test alert will run the command
“id | tee /tmp/ttttttddddssss” as root.
* after the test alert inspect
/tmp/ttttttddddssss it'll contain the ids of the root user.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
OSNEXUS · QuantaStorRelated CVEs — OSNEXUS QuantaStor
In the same product, most dangerous first.
CVE-2021-42081CRITICALAuthenticated Remote Command Execution vulnerability in OSNEXUS QuantaStor before 6.0.0.355EPSS 1.2%CVE-2026-18265CRITICALOSNEXUS QuantaStor Missing Authentication Remote Code Execution VulnerabilityEPSS 1.0%CVE-2021-42080HIGHReflected XSS vulnerability in OSNEXUS QuantaStor before 6.0.0.355EPSS 0.7%CVE-2021-42079MEDIUMSSRF vulnerability in OSNEXUS QuantaStor before 6.0.0.355EPSS 0.7%CVE-2021-42083HIGHAuthenticated Stored XSS in OSNEXUS QuantaStor 6.0.0.335EPSS 0.5%CVE-2021-42082HIGHLocal Privilege Escalation to root in OSNEXUS QuantaStor before 6.0.0.355EPSS 0.2%