CVE-2021-23885CWE-269

Privilege escalation vulnerability in McAfee Web Gateway (MWG) UI

Critical · published February 17, 2021

CVSS v3.1
9.0
EPSS
1%
Percentile
65.0
In the wild
Unconfirmed
What it is

🚨 An authenticated user can leverage a little-known trick to elevate their privileges in McAfee Web Gateway (MWG) below version 9.2.8 — it’s like letting a guest into your house and finding out they can unlock every door! 🔥 Imagine inviting someone over for dinner but neglecting to check if they have the keys to your entire house. This vulnerability allows an authenticated user to gain excessive access through a flaw in the troubleshooting page, much like a guest who sneaks into your private stash of secret recipes. An attacker could exploit this vulnerability to execute commands on the appliance with elevated privileges, essentially opening the floodgates to unauthorized access. This could lead to data leaks, system manipulation, or even disabling security features — absolutely devastating for your network's integrity!

Put simply

Imagine inviting someone over for dinner but neglecting to check if they have the keys to your entire house. This vulnerability allows an authenticated user to gain excessive access through a flaw in the troubleshooting page, much like a guest who sneaks into your private stash of secret recipes. This privilege escalation vulnerability arises from improper handling of user input on the troubleshooting page, enabling an authenticated user to escalate their privileges and run arbitrary commands on the McAfee Web Gateway.

What to do

An attacker could exploit this vulnerability to execute commands on the appliance with elevated privileges, essentially opening the floodgates to unauthorized access. This could lead to data leaks, system manipulation, or even disabling security features — absolutely devastating for your network's integrity! Immediate action is crucial: upgrade to McAfee Web Gateway version 9.2.8 or later to close this exploit. Additionally, review access controls and ensure that only authorized users have access to sensitive pages. Don't forget to monitor logs for any suspicious activity! You’ve got this! By applying these steps, you’ll secure your system and keep your network safe and sound! 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01087 · 65.0th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2021-02-17T09:20Z
EPSS history
Timeline
  • 17 FEB 09:20Z
    Privilege escalation vulnerability in McAfee Web Gateway (MWG) UI
    cvelistv5