CVE-2017-2921

An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8

High · published November 7, 2017

CVSS v3.0
8.1
EPSS
2%
Percentile
84.0
In the wild
Unconfirmed
What it is

⚡ A single malicious websocket packet is all it takes to exploit this vulnerability! 🌐💥 Think of it like a courier delivering a package with a ticking time bomb inside — a seemingly normal delivery that can cause chaos when it arrives. In this case, the package is an integer overflow that leads to a heap buffer overflow, causing your server to crumble under pressure. An attacker can send this specially crafted packet over the network, leading to a denial of service that could crash your application or, even worse, grant them remote control access. This can be absolutely devastating for your infrastructure, putting sensitive data and processes at risk!

Put simply

Think of it like a courier delivering a package with a ticking time bomb inside — a seemingly normal delivery that can cause chaos when it arrives. In this case, the package is an integer overflow that leads to a heap buffer overflow, causing your server to crumble under pressure. This vulnerability in Cesanta Mongoose 6.8 allows for an integer overflow in the websocket protocol implementation, which can subsequently lead to a heap buffer overflow. This situation opens the door for denial of service and potential remote code execution if exploited.

What to do

An attacker can send this specially crafted packet over the network, leading to a denial of service that could crash your application or, even worse, grant them remote control access. This can be absolutely devastating for your infrastructure, putting sensitive data and processes at risk! To mitigate this vulnerability, upgrade Mongoose to version 6.9 or later immediately. Additionally, consider implementing strict input validation and monitoring for suspicious websocket traffic to prevent any potential exploit attempts. 🔒 You’ve got this! Take these steps and you’ll have your system fortified against this threat in no time. 🛡️

The record
Technical detail
CVSS v3.0
8.1 · HIGH
Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02417 · 84.0th percentile
Published
2017-11-07T16:00Z
EPSS history
Timeline
  • 07 NOV 16:00Z
    An exploitable memory corruption vulnerability exists in the Websocket protocol implementation of Cesanta Mongoose 6.8
    cvelistv5