Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2023-40164
CVE-2023-40164:
Notepad++ vulnerability analysis and mitigation
Overview
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to global buffer read overflow in nsCodingStateMachine::NextStater. The vulnerability was discovered and reported by GHSL team member Jaroslav Lobačevski (GitHub Advisory).
Technical details
The vulnerability occurs in the nsCodingStateMachine::NextState function where the array index byteCls depends on the input file content and can exceed the size of the charLenTable buffer. For example, when byteCls is set to 9, it attempts to read beyond the ISO2022JPCharLenTable which contains only 8 elements, resulting in a buffer overflow condition. The vulnerability has been assigned a CVSS 3.1 Base Score of 5.5 MEDIUM (Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) (NVD).
Impact
The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information (GitHub Advisory).
Mitigation and workarounds
As of the time of publication, no known patches are available in existing versions of Notepad++ (NVD).
Additional resources
Source: This report was generated using AI
Related Notepad++ vulnerabilities:
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