CVE-2021-32163

Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via case-sensitive JWT authorization

Critical · published February 17, 2023

CVSS v3.1
9.8
EPSS
1%
Percentile
60.8
In the wild
Unconfirmed
What it is

🔥 An authentication flaw in MOSN v0.23.0 unlocks a VIP access door with just the right case-sensitive token! This vulnerability is like a doorman who only checks for lowercase letters on your ID while ignoring the uppercase ones — slip in with a simple case change! An attacker could easily escalate privileges and gain access to sensitive resources, potentially allowing them to change configurations, manipulate data, or even take over the system entirely. This could lead to absolutely devastating consequences for your application and its users!

Put simply

This vulnerability is like a doorman who only checks for lowercase letters on your ID while ignoring the uppercase ones — slip in with a simple case change! This vulnerability allows unauthorized users to bypass JWT authorization controls by exploiting case sensitivity, meaning they can access areas reserved for high-privilege accounts.

What to do

An attacker could easily escalate privileges and gain access to sensitive resources, potentially allowing them to change configurations, manipulate data, or even take over the system entirely. This could lead to absolutely devastating consequences for your application and its users! Upgrade MOSN to version 0.24.0 immediately to patch this critical vulnerability. Additionally, review your authentication tokens to enforce case sensitivity checks and implement enhanced logging to monitor for unusual access patterns. You've got this! By taking these steps, you’ll be securing your application and keeping those pesky attackers at bay! 🛡️

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
0.00946 · 60.8th percentile
Published
2023-02-17T00:00Z
EPSS history
Timeline
  • 17 FEB 00:00Z
    Authentication vulnerability in MOSN v.0.23.0 allows attacker to escalate privileges via case-sensitive JWT authorization
    cvelistv5