CVE-2023-20596

Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0 access potentially leading to arbitrary code…

published November 14, 2023

CVSS
—
EPSS
1%
Percentile
63.8
In the wild
Unconfirmed
What it is

⚠️ A compromised SMI handler is all it takes to gain Ring0 access! This vulnerability in the SMM Supervisor is like a sneaky backdoor into your computer's very core. 🔥 Think of it as a backstage pass at a concert, where any unauthorized guest can suddenly access the inner workings of the entire show. One compromised handler could allow attackers to conduct their own performance right at the heart of your system! If exploited, this vulnerability could allow an attacker to execute arbitrary code at the highest privilege level, potentially jeopardizing the entire operating environment. It’s like giving someone the power to control every piece of equipment at that concert—disastrous and absolutely devastating!

Put simply

Think of it as a backstage pass at a concert, where any unauthorized guest can suddenly access the inner workings of the entire show. One compromised handler could allow attackers to conduct their own performance right at the heart of your system! This vulnerability stems from improper input validation in the SMM Supervisor, which could enable a compromised SMI handler to achieve Ring0 access, allowing for arbitrary code execution.

What to do

If exploited, this vulnerability could allow an attacker to execute arbitrary code at the highest privilege level, potentially jeopardizing the entire operating environment. It’s like giving someone the power to control every piece of equipment at that concert—disastrous and absolutely devastating! To protect against this vulnerability, ensure that your system firmware is up to date, and monitor for any suspicious SMI handler activity. Implement security measures that validate inputs thoroughly to block any unauthorized access attempts. You've got this! With timely updates and vigilance, you can keep your systems safe and sound. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01045 · 63.8th percentile
Published
2023-11-14T18:55Z
EPSS history
Timeline
  • 14 NOV 18:55Z
    Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0 access potentially leading to arbitrary code…
    cvelistv5