CVE-2019-18858

CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow

published November 20, 2019

CVSS
—
EPSS
2%
Percentile
80.0
In the wild
Unconfirmed
What it is

⚠️ A sneaky buffer overflow is lurking in CODESYS 3 web server versions before 3.5.15.20! This could let crafty attackers gain control in unexpected ways! 🔥 Think of it like a crowded elevator that suddenly overloads; if too many people push in at once, it could malfunction and lead to chaos! Similarly, this buffer overflow can cause the application to misbehave, putting your system at risk. An attacker could exploit this vulnerability to manipulate the system, potentially leading to unauthorized access. While it's not currently known to be exploited in the wild, the risk of unexpected behavior and data leakage is still a concern. It's a ticking time bomb waiting for the right conditions!

Put simply

Think of it like a crowded elevator that suddenly overloads; if too many people push in at once, it could malfunction and lead to chaos! Similarly, this buffer overflow can cause the application to misbehave, putting your system at risk. This buffer overflow occurs when the web server fails to properly validate input, allowing an attacker to overflow a buffer and execute arbitrary code. This can lead to unpredictable application behavior or even full system control.

What to do

An attacker could exploit this vulnerability to manipulate the system, potentially leading to unauthorized access. While it's not currently known to be exploited in the wild, the risk of unexpected behavior and data leakage is still a concern. It's a ticking time bomb waiting for the right conditions! Upgrade your CODESYS 3 web server to version 3.5.15.20 or later to patch this vulnerability. Additionally, regularly review and harden your input validation processes to prevent similar issues in the future. You've got this! Just follow these steps and you’ll keep your systems safe and sound. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01945 · 80.0th percentile
Published
2019-11-20T17:04Z
EPSS history
Timeline
  • 20 NOV 17:04Z
    CODESYS 3 web server before 3.5.15.20, as distributed with CODESYS Control runtime systems, has a Buffer Overflow
    cvelistv5