CVE-2021-40866

Certain NETGEAR smart switches are affected by a remote admin password change by an unauthenticated attacker via the (disabled by default) /sqfs/bin/sccd…

Critical · published September 13, 2021

CVSS v3.1
9.8
EPSS
2%
Percentile
77.8
In the wild
Unconfirmed
What it is

🚨 Unauthenticated attackers can change admin passwords on several NETGEAR smart switches just by sending a rogue packet! Imagine someone replacing the locks on your office door without a key - now that’s wild! 🔥 Think of this vulnerability like a restaurant where anyone can sneak in and swap the chef's special for something less appealing because nobody bothered to check their reservation. It's a recipe for disaster, especially if they know how to play the system! With this vulnerability, an attacker could gain full control of your network switches, changing settings at will and potentially causing chaos in your entire network infrastructure. This could lead to unauthorized data access, denial of service, or even full network compromise, leaving your digital assets exposed to threats.

Put simply

Think of this vulnerability like a restaurant where anyone can sneak in and swap the chef's special for something less appealing because nobody bothered to check their reservation. It's a recipe for disaster, especially if they know how to play the system! This CVE stems from the /sqfs/bin/sccd daemon failing to authenticate properly when it receives an NSDP packet without a required authentication TLV. As a result, attackers can exploit this flaw on vulnerable NETGEAR switches to change admin passwords without any authentication.

What to do

With this vulnerability, an attacker could gain full control of your network switches, changing settings at will and potentially causing chaos in your entire network infrastructure. This could lead to unauthorized data access, denial of service, or even full network compromise, leaving your digital assets exposed to threats. To remediate this vulnerability, immediately update your NETGEAR switches to the latest firmware versions: GC108P/GC108PP to 1.0.8.2, GS108Tv3/GS110TPP/GS110TPv3/GS110TUP to 7.0.7.2, GS308T/GS310TP to 1.0.3.2, and so on. Additionally, consider disabling the vulnerable daemon if not in use, and review authentication settings to enhance security. You've got this! By acting quickly, you can secure your switches and keep your network safe from potential hijinks! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N
CVSS v4.0
Not supplied
EPSS
0.01756 · 77.8th percentile
Published
2021-09-13T07:16Z
EPSS history
Timeline
  • 13 SEP 07:16Z
    Certain NETGEAR smart switches are affected by a remote admin password change by an unauthenticated attacker via the (disabled by default) /sqfs/bin/sccd…
    cvelistv5