CVE-2024-42330CWE-134

JS - Internal strings in HTTP headers

Critical · published November 27, 2024

CVSS v3.1
9.1
EPSS
1%
Percentile
60.7
In the wild
Unconfirmed
What it is

🔥 A sneaky flaw in the HttpRequest object could let an attacker access hidden internal properties of your web applications with just a crafted response! Think of the HttpRequest as a waiter who brings back a dish from the kitchen but doesn't check if the ingredients are safe — he just serves whatever the chef sends out. If the chef slips in a rogue ingredient, it could spoil the entire meal for everyone! An attacker could exploit this vulnerability to manipulate internal JavaScript objects, potentially leading to unauthorized access or data exposure. This could be absolutely devastating, allowing full visibility or control over sensitive application areas, making it a critical threat.

Put simply

Think of the HttpRequest as a waiter who brings back a dish from the kitchen but doesn't check if the ingredients are safe — he just serves whatever the chef sends out. If the chef slips in a rogue ingredient, it could spoil the entire meal for everyone! This vulnerability arises because the HttpRequest object directly uses raw server response strings without proper encoding for JavaScript, enabling the creation of internal strings that can manipulate object properties.

What to do

An attacker could exploit this vulnerability to manipulate internal JavaScript objects, potentially leading to unauthorized access or data exposure. This could be absolutely devastating, allowing full visibility or control over sensitive application areas, making it a critical threat. To protect your applications, immediately review and patch the HttpRequest implementation to ensure proper encoding of server response strings. Check for any updates that address this vulnerability and prioritize deploying them throughout your environment. You’ve got this! Follow these steps, and you'll lock things down tight in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00945 · 60.7th percentile
Weakness
CWE-134 · Use of Externally-Controlled Format String
Published
2024-11-27T12:05Z
EPSS history
Timeline
  • 27 NOV 12:05Z
    JS - Internal strings in HTTP headers
    cvelistv5