Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the WinGup decompress function joins untrusted ZIP entry names to unzipDestTo without canonical containment validation, allowing an entry such as ../mimeTools/mimeTools.dll to overwrite a DLL in a sibling plugin directory and execute attacker-controlled code when Notepad++ next loads that plugin. This issue is fixed in version 8.9.7.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
None
No 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/releases/tag/v8.9.7
security-advisories@github.com
https://github.com/notepad-plus-plus/notepad-plus-plus/security/advisories/GHSA…
security-advisories@github.com
https://github.com/notepad-plus-plus/wingup/commit/7670296a5c7fdec624e0a45dbde5…
security-advisories@github.com
https://github.com/notepad-plus-plus/wingup/pull/106
security-advisories@github.com