CVE-2023-4041CWE-120CWE-787CWE-913

Second Stage Gecko Bootloader GBL Parser Buffer Overrun Vulnerability

Critical · published August 23, 2023

CVSS v3.1
9.8
EPSS
0%
Percentile
32.9
In the wild
Unconfirmed
What it is

🚨 A classic buffer overflow and out-of-bounds write flaw lurks in the Silicon Labs Gecko Bootloader, potentially letting attackers execute arbitrary code without breaking a sweat! 🔥 Think of it like a restaurant chef who never checks the order sizes before cooking — if a customer orders a small plate but the kitchen prepares an entire banquet, it can lead to chaos. This vulnerability allows malicious code to sneak in just like that oversized meal! An attacker could exploit this flaw to inject malicious code and bypass authentication entirely, creating a backdoor to your system. This could lead to unauthorized access, data breaches, or even total control over the affected device. The consequences could be absolutely devastating!

Put simply

Think of it like a restaurant chef who never checks the order sizes before cooking — if a customer orders a small plate but the kitchen prepares an entire banquet, it can lead to chaos. This vulnerability allows malicious code to sneak in just like that oversized meal! This vulnerability stems from a buffer overflow in the Gecko Bootloader's firmware update file parser, which fails to properly validate the size of the input. This oversight allows for out-of-bounds writes, making code injection and authentication bypass possible.

What to do

An attacker could exploit this flaw to inject malicious code and bypass authentication entirely, creating a backdoor to your system. This could lead to unauthorized access, data breaches, or even total control over the affected device. The consequences could be absolutely devastating! Immediately update the Gecko Bootloader to the latest version that addresses this vulnerability. Review your devices and ensure that you have integrity checks in place for firmware updates to prevent unauthorized code execution. Don't delay on this one! You've got this! By acting quickly and following these steps, your systems will be much safer in no time. 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00398 · 32.9th percentile
Weaknesses
CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'); CWE-787 · Out-of-bounds Write; CWE-913 · Improper Control of Dynamically-Managed Code Resources
Published
2023-08-23T04:09Z
EPSS history
Timeline
  • 23 AUG 04:09Z
    Second Stage Gecko Bootloader GBL Parser Buffer Overrun Vulnerability
    cvelistv5