CVE-2021-21805CWE-78

An OS Command Injection vulnerability exists in the ping.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020)

Critical · published August 5, 2021

Patch now

High probability of exploitation

CVSS calls it critical at 9.8. It sits in the 99.4th percentile for exploit probability.

CVSS v3.0
9.8
EPSS
70%
Percentile
99.4
In the wild
Unconfirmed
What it is

🔥 A crafty HTTP request can unleash a command execution storm in Advantech R-SeeNet v2.4.12 — that’s a techie’s worst nightmare! 🚨 Think of this vulnerability like a sneaky delivery person who can access the back door of a restaurant with just a fake delivery label — they could toss in anything, turning the kitchen into chaos! If exploited, an attacker could execute arbitrary commands on the server, potentially gaining full control over the system. This means they could access sensitive data, alter configurations, or even bring your entire operation to a screeching halt. Yikes!

Put simply

Think of this vulnerability like a sneaky delivery person who can access the back door of a restaurant with just a fake delivery label — they could toss in anything, turning the kitchen into chaos! This OS Command Injection flaw in the ping.php script allows attackers to send specially crafted HTTP requests that the server executes without proper validation, leading to unauthorized command execution.

What to do

If exploited, an attacker could execute arbitrary commands on the server, potentially gaining full control over the system. This means they could access sensitive data, alter configurations, or even bring your entire operation to a screeching halt. Yikes! To protect your system, immediately patch Advantech R-SeeNet to a fixed version. Review your web application firewall rules and ensure they properly filter out malicious requests. Lastly, audit your server for any unusual activity — better safe than sorry! You’ve got this! With the right steps, you'll secure your system in no time! 🛡️

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
0.69842 · 99.4th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2021-08-05T20:03Z
EPSS history
Timeline
  • 05 AUG 20:03Z
    An OS Command Injection vulnerability exists in the ping.php script functionality of Advantech R-SeeNet v 2.4.12 (20.10.2020)
    cvelistv5