CVE-2021-34345CWE-787

Stack Based Overflow Vulnerability in NVR Storage Expansion

Critical · published September 10, 2021

CVSS v3.1
9.8
EPSS
2%
Percentile
75.3
In the wild
Unconfirmed
What it is

🚨 A stack buffer overflow in QNAP's NVR Storage Expansion can lead to a scenario where attackers execute arbitrary code with a single malformed input! 🔥 Think of this vulnerability like an overstuffed suitcase at the airport — if you pack too much in, it can burst open and spill everything out. Here, the buffer overflow lets attackers pack their own code into a vulnerable spot, causing chaos! If exploited, this vulnerability could allow attackers to take control of your device, running malicious code with the same privileges as the NVR system. This could mean unauthorized access to sensitive data, disruption of services, or even using your device for nefarious purposes. Absolutely devastating!

Put simply

Think of this vulnerability like an overstuffed suitcase at the airport — if you pack too much in, it can burst open and spill everything out. Here, the buffer overflow lets attackers pack their own code into a vulnerable spot, causing chaos! This stack buffer overflow occurs when the NVR Storage Expansion improperly handles specific inputs, allowing for arbitrary code execution due to memory corruption. Attackers can exploit this flaw to execute their code on the device, potentially compromising it completely.

What to do

If exploited, this vulnerability could allow attackers to take control of your device, running malicious code with the same privileges as the NVR system. This could mean unauthorized access to sensitive data, disruption of services, or even using your device for nefarious purposes. Absolutely devastating! To protect yourself, update your QNAP NVR Storage Expansion to version 1.0.6 or later as soon as possible. Regularly check for firmware updates and consider implementing stricter input validation to enhance security. Don't leave your device vulnerable! You've got this! By taking these steps, you can secure your device and keep those pesky attackers at bay! 🛡️

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
0.01579 · 75.3th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2021-09-10T04:00Z
EPSS history
Timeline
  • 10 SEP 04:00Z
    Stack Based Overflow Vulnerability in NVR Storage Expansion
    cvelistv5