CVE-2021-21502

Dell PowerScale OneFS versions 8.1.0 – 9.1.0 contain a "use of SSH key past account expiration" vulnerability

Critical · published February 9, 2021

CVSS v3.1
9.8
EPSS
1%
Percentile
72.5
In the wild
Unconfirmed
What it is

🚨 A high-privilege SSH key can keep working even after your account is expired! This sneaky flaw in Dell PowerScale OneFS can have critical consequences. 🔥 This is like allowing someone to continue using their old keycard to access secure areas long after they’ve left the company—giving them a backstage pass they should no longer have! An attacker with this vulnerability could exploit their expired account, regaining access to sensitive data and systems as if nothing had happened. This could lead to unauthorized actions, data breaches, or even severe outages—absolutely devastating for security and trust!

Put simply

This is like allowing someone to continue using their old keycard to access secure areas long after they’ve left the company—giving them a backstage pass they should no longer have! CVE-2021-21502 allows users with the ISI_PRIV_AUTH_SSH RBAC privilege to access SSH keys even after their accounts have expired, bypassing normal security measures and retaining prior permissions.

What to do

An attacker with this vulnerability could exploit their expired account, regaining access to sensitive data and systems as if nothing had happened. This could lead to unauthorized actions, data breaches, or even severe outages—absolutely devastating for security and trust! Dell recommends upgrading to a version after 9.1.0 immediately to patch this vulnerability. Additionally, review your user accounts and SSH key policies to ensure expired accounts can’t access systems. Regular audits will help maintain a secure environment! You've got this! Implement these steps and you'll be back on the path to safety in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01412 · 72.5th percentile
Published
2021-02-09T21:25Z
EPSS history
Timeline
  • 09 FEB 21:25Z
    Dell PowerScale OneFS versions 8.1.0 – 9.1.0 contain a "use of SSH key past account expiration" vulnerability
    cvelistv5