CVE-2023-20273KEV · OVERDUECWE-78

Cisco IOS XE Web UI Command Injection Vulnerability

High · published October 24, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.2. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

1094
days past CISA
deadline
CVSS v3.1
7.2
EPSS
93%
Percentile
99.8
In the wild
Confirmed
What it is

🚨 An authenticated attacker can take root control with just a crafty command injection! This sneaky flaw in the web UI of Cisco IOS XE Software allows for some serious mischief. ⚡️ Think of it like an employee who has the ability to access the office's internal kitchen but can also sneak in a menu to change every dish to their liking without anyone noticing. A little input can lead to a lot of chaos! This vulnerability is a big deal! If exploited, an attacker could run commands with root privileges on the operating system. That means they could potentially alter configurations, access sensitive data, or even take full control of the system—absolutely devastating!

Put simply

Think of it like an employee who has the ability to access the office's internal kitchen but can also sneak in a menu to change every dish to their liking without anyone noticing. A little input can lead to a lot of chaos! The flaw arises from insufficient input validation in the web UI, enabling an authenticated attacker to inject malicious commands that run with elevated privileges. They just need to send crafted input to the interface to gain control.

What to do

This vulnerability is a big deal! If exploited, an attacker could run commands with root privileges on the operating system. That means they could potentially alter configurations, access sensitive data, or even take full control of the system—absolutely devastating! To patch this vulnerability, upgrade to the latest version of Cisco IOS XE Software immediately. Additionally, review user access controls to ensure that only necessary personnel have authenticated access. Keep monitoring your systems for any unusual activity! You've got this! By following these steps, you'll enhance your security posture and protect your systems. 🛡️

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.92938 · 99.8th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2023-10-24T14:13Z
KEV added
2023-10-23 · due 2023-10-27
EPSS history
Timeline
  • 24 OCT 14:13Z
    A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root
    cvelistv5
  • 23 OCT 00:00Z
    Added to CISA KEV — remediate by Oct 27
    kev