CVE-2021-37909CWE-20

CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation

Critical · published September 15, 2021

CVSS v3.1
9.8
EPSS
2%
Percentile
80.7
In the wild
Unconfirmed
What it is

🔥 A remote attacker can rewrite to the registry without permissions! This gaping hole in the TSSServiSign component makes hijacking your system as easy as pie! Think of it like a delivery worker who can drop off packages at any front door without checking if they have the right address – that's what this vulnerability allows! An attacker can just waltz in and change crucial settings without anyone batting an eye. If exploited, attackers could execute arbitrary code on your system, leading to full control over the compromised machine. This could result in a complete system takeover, data theft, or even turning the machine into a launchpad for further attacks – absolutely devastating!

Put simply

Think of it like a delivery worker who can drop off packages at any front door without checking if they have the right address – that's what this vulnerability allows! An attacker can just waltz in and change crucial settings without anyone batting an eye. This CVE stems from the WriteRegistry function in TSSServiSign, which fails to properly filter and verify user input. As a result, attackers can manipulate the registry without proper authorization, leading to potential remote code execution.

What to do

If exploited, attackers could execute arbitrary code on your system, leading to full control over the compromised machine. This could result in a complete system takeover, data theft, or even turning the machine into a launchpad for further attacks – absolutely devastating! Immediately apply the latest patch provided by the vendor to secure your system. Review your configuration settings for the TSSServiSign component and ensure proper user input validation is enforced. Don’t forget to monitor your systems for any suspicious activities! You've got this! With these steps, you'll have your system secure in no time! 🛡️

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
0.02007 · 80.7th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2021-09-15T19:10Z
EPSS history
Timeline
  • 15 SEP 19:10Z
    CHANGING Inc. TSSServiSignAdapter Windows Versions - Improper Input Validation
    cvelistv5