Notepad++ is a free and open-source source code editor. From 8.9.7 until 8.9.8, the Notepad++ updater and signature verification path can accept a modified GUP.exe file whose embedded certificate metadata remains present even though its Authenticode digest is invalid. An attacker who can replace or plant the updater-related file can cause Notepad++ to launch attacker-modified code when a user triggers the updater path, but the issue does not provide remote code execution by itself.
This issue is fixed in version 8.9.8.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
notepad-plus-plus:notepad-plus-plus
References 4
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA…
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA-cx87-7hhq-m2j3
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/9edf40f725ce62b26…
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/9edf40f725ce62b26c454905e39f0f7fdbbb3ffa
https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8
https://github.com/notepad-plus-plus/notepad-plus-plus/releases/tag/v8.9.8
https://notepad-plus-plus.org/news/v898-released
https://notepad-plus-plus.org/news/v898-released