CVE-2023-47565KEV · OVERDUECWE-78

Legacy VioStor NVR

High · published December 8, 2023

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.0. It is confirmed in active exploitation. It sits in the 99.5th percentile for exploit probability.

1016
days past CISA
deadline
CVSS v3.1
8.0
EPSS
73%
Percentile
99.5
In the wild
Confirmed
What it is

🚨 A crafty command injection vulnerability lurks in legacy QNAP VioStor NVR models running QVR Firmware 4.x! ⚡ Just a sneaky command from an authenticated user can wreak havoc over the network! Think of this as a hotel where guests can suddenly gain the master key — they can access any room, change reservations, or even check out without permission! Just like a sneaky guest can disrupt everything, an attacker can send malicious commands to your system with this flaw. If exploited, this vulnerability could allow an attacker to execute any command they desire, potentially compromising sensitive data, altering configurations, or even causing a full system meltdown. It’s absolutely devastating if a malicious user gains control over your devices!

Put simply

Think of this as a hotel where guests can suddenly gain the master key — they can access any room, change reservations, or even check out without permission! Just like a sneaky guest can disrupt everything, an attacker can send malicious commands to your system with this flaw. This OS command injection vulnerability allows authenticated users to run arbitrary commands on the underlying system via the network, taking advantage of insufficient input validation in QVR Firmware 4.x.

What to do

If exploited, this vulnerability could allow an attacker to execute any command they desire, potentially compromising sensitive data, altering configurations, or even causing a full system meltdown. It’s absolutely devastating if a malicious user gains control over your devices! To secure your system, immediately upgrade to QVR Firmware version 5.0.0 or later. Ensure that all access controls are robust and monitor your network for any unauthorized command activities. Don’t leave anything to chance! This is fixable! Follow these steps to lock down your system like a pro! 🛡️

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.73277 · 99.5th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2023-12-08T16:06Z
KEV added
2023-12-21 · due 2024-01-11
EPSS history
Timeline
  • 21 DEC 00:00Z
    Added to CISA KEV — remediate by Jan 11
    kev
  • 08 DEC 16:06Z
    Legacy VioStor NVR
    cvelistv5