CVE-2017-2891

An exploitable use-after-free vulnerability exists in the HTTP server implementation of Cesanta Mongoose 6.8

Critical · published November 7, 2017

CVSS v3.0
9.8
EPSS
3%
Percentile
86.1
In the wild
Unconfirmed
What it is

🚨 A sneaky use-after-free vulnerability in Cesanta Mongoose 6.8 could let attackers execute remote code with just one innocent HTTP POST request. 🔥 Think of it like a restaurant that still serves meals from a table that’s already been cleared — once the old order is out, someone could sneak in a new one without the kitchen even knowing. That’s how this vulnerability operates, reusing freed pointers and letting attackers take control! If exploited, this vulnerability can lead to remote code execution, allowing attackers to run arbitrary commands on the server. Imagine an intruder walking straight into the back office, accessing sensitive data, or even hijacking the entire system — absolutely devastating! This could compromise user data and disrupt services. 🔥

Put simply

Think of it like a restaurant that still serves meals from a table that’s already been cleared — once the old order is out, someone could sneak in a new one without the kitchen even knowing. That’s how this vulnerability operates, reusing freed pointers and letting attackers take control! This use-after-free vulnerability in the HTTP server allows an attacker to trigger the reuse of a previously freed pointer, potentially leading to execution of malicious code. By sending a specially crafted HTTP POST request to a CGI target, an attacker can exploit this flaw.

What to do

If exploited, this vulnerability can lead to remote code execution, allowing attackers to run arbitrary commands on the server. Imagine an intruder walking straight into the back office, accessing sensitive data, or even hijacking the entire system — absolutely devastating! This could compromise user data and disrupt services. 🔥 To protect your systems, upgrade to Cesanta Mongoose version 6.9 or later immediately. Ensure that your configuration settings are secure and consider implementing additional network-level protections. 🛡️ You've got this! Patch your systems and keep your applications secure. Together, we can make the internet a safer place! 😄

The record
Technical detail
CVSS v3.0
9.8 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02760 · 86.1th percentile
Published
2017-11-07T16:00Z
EPSS history
Timeline
  • 07 NOV 16:00Z
    An exploitable use-after-free vulnerability exists in the HTTP server implementation of Cesanta Mongoose 6.8
    cvelistv5