CVE-2021-26561CWE-121

Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers…

Critical · published February 26, 2021

CVSS v3.1
9.0
EPSS
2%
Percentile
81.2
In the wild
Unconfirmed
What it is

🔥 A single crafted HTTP header could let attackers run rogue code on your Synology NAS. Yes, you read that right! Think of it like a delivery person slipping a note into your mailbox that looks official but tells your home to unlock the front door. With this buffer overflow vulnerability, the attacker can send malicious commands to your device without even breaking a sweat! This could lead to dire consequences, like unauthorized access to your data or even total control over your device—an absolute nightmare! Imagine an intruder having the power to manipulate your files, install malicious software, or disrupt your services. This isn’t just a minor inconvenience; it’s a full-blown security crisis!

Put simply

Think of it like a delivery person slipping a note into your mailbox that looks official but tells your home to unlock the front door. With this buffer overflow vulnerability, the attacker can send malicious commands to your device without even breaking a sweat! This stack-based buffer overflow in Synology's synoagentregisterd allows attackers to inject arbitrary code through a malicious syno_finder_site HTTP header, making it a potent vector for exploitation.

What to do

This could lead to dire consequences, like unauthorized access to your data or even total control over your device—an absolute nightmare! Imagine an intruder having the power to manipulate your files, install malicious software, or disrupt your services. This isn’t just a minor inconvenience; it’s a full-blown security crisis! To protect yourself, patch your Synology DiskStation Manager to version 6.2.3-25426-3 or later immediately. Monitor your network for any suspicious activity and consider enabling additional firewall protections. Don’t leave your data vulnerable! You've got this! Follow these steps, and you’ll secure your Synology like a pro! 🛡️

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.02061 · 81.2th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2021-02-26T21:45Z
EPSS history
Timeline
  • 26 FEB 21:45Z
    Stack-based buffer overflow vulnerability in synoagentregisterd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers…
    cvelistv5