CVE-2023-5347CWE-327CWE-347

Unauthenticated Firmware Upgrade

Critical · published January 9, 2024

CVSS v3.1
9.8
EPSS
1%
Percentile
70.9
In the wild
Unconfirmed
What it is

🔥 A misstep in Korenix JetNet devices opens the door to a full system takeover simply by exploiting improper cryptographic signature verification in the update process! Imagine a trusted delivery service that doesn't check the identity of packages being sent for delivery. If they let anyone swap out important documents, chaos could ensue, and your most sensitive secrets could be compromised! An attacker could completely replace the operating system and trusted executables on affected JetNet devices, leading to total control over the system. This could allow for data manipulation, eavesdropping, or even turning the devices into malicious tools, putting your entire network at risk!

Put simply

Imagine a trusted delivery service that doesn't check the identity of packages being sent for delivery. If they let anyone swap out important documents, chaos could ensue, and your most sensitive secrets could be compromised! This vulnerability stems from an improper verification of cryptographic signatures during the firmware update process, enabling unauthorized users to install rogue firmware that can execute arbitrary code.

What to do

An attacker could completely replace the operating system and trusted executables on affected JetNet devices, leading to total control over the system. This could allow for data manipulation, eavesdropping, or even turning the devices into malicious tools, putting your entire network at risk! Upgrade all JetNet devices to firmware version 2024/01 or later immediately. Regularly audit your systems to ensure that all updates are from trusted sources and implement additional security measures like network segmentation. Don't forget to document your update processes! You can tackle this vulnerability head-on! Follow these steps and keep your network secure! 🛡️

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
0.01342 · 70.9th percentile
Weaknesses
CWE-327 · Use of a Broken or Risky Cryptographic Algorithm; CWE-347 · Improper Verification of Cryptographic Signature
Published
2024-01-09T09:54Z
EPSS history
Timeline
  • 09 JAN 09:54Z
    Unauthenticated Firmware Upgrade
    cvelistv5