CVE-2023-39969CWE-347

uthenticode signature validation bypass vulnerability

Critical · published August 9, 2023

CVSS v3.1
9.1
EPSS
1%
Percentile
46.6
In the wild
Unconfirmed
What it is

🔥 An attacker could sneak malicious code into binaries without raising any alarms — a stealthy digital magician’s trick! 🚨 This is like a restaurant switching out the high-quality steak for a cheap substitute but keeping the fancy menu description intact. The diners (or users) think they’re getting the real deal, but only the chef (or attacker) knows the difference! The consequences could be absolutely devastating: an attacker could modify the code and make it look legitimate, leading to potential data breaches or unauthorized access to sensitive systems. This vulnerability makes it dangerously easy to bypass security measures, putting users and entire infrastructures at risk!

Put simply

This is like a restaurant switching out the high-quality steak for a cheap substitute but keeping the fancy menu description intact. The diners (or users) think they’re getting the real deal, but only the chef (or attacker) knows the difference! CVE-2023-39969 in uthenticode allows an attacker to alter code within a binary without affecting its Authenticode hash, violating the expected validation method. Instead of hashing by virtual address, it hashes the entire file, creating a deceptive appearance of authenticity.

What to do

The consequences could be absolutely devastating: an attacker could modify the code and make it look legitimate, leading to potential data breaches or unauthorized access to sensitive systems. This vulnerability makes it dangerously easy to bypass security measures, putting users and entire infrastructures at risk! Upgrade uthenticode immediately to version 2.x, which resolves this oversight. If you are on version 1.0.9, do not downgrade — patching is critical. As there are no workarounds, make this a priority! You've got this! With a quick upgrade, you'll have your systems locked down and secure in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.1 · 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
0.00574 · 46.6th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2023-08-09T15:34Z
EPSS history
Timeline
  • 09 AUG 15:34Z
    uthenticode signature validation bypass vulnerability
    cvelistv5