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CVE-2023-40036— Notepad++ global buffer read overflow in CharDistributionAnalysis::HandleOneChar

Quick assessment

Affected
notepad-plus-plus notepad-plus-plus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Notepad++是中国台湾侯今吾（Don Ho）个人开发者的一款开源的纯文本编辑器。 Notepad++ 存在安全漏洞，该漏洞源于在CharDistributionAnalysis::HandleOneChar函数中存在全局缓冲区读取溢出漏洞。

CVSS 5.5 · Medium EPSS 0.38% · P29

Possible ATT&CK Techniques 1 AI

T1056.001 · Keylogging
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I. Basic Information for CVE-2023-40036

Vulnerability Information
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Vulnerability Title
Notepad++ global buffer read overflow in CharDistributionAnalysis::HandleOneChar
Source: CVE Program / CVE List V5
Vulnerability Description
Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to global buffer read overflow in `CharDistributionAnalysis::HandleOneChar`. The exploitability of this issue is not clear. Potentially, it may be used to leak internal memory allocation information. As of time of publication, no known patches are available in existing versions of Notepad++.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
Notepad++ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Notepad++是中国台湾侯今吾（Don Ho）个人开发者的一款开源的纯文本编辑器。 Notepad++ 存在安全漏洞，该漏洞源于在CharDistributionAnalysis::HandleOneChar函数中存在全局缓冲区读取溢出漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
notepad-plus-plus notepad-plus-plus <= 8.5.6 -

II. Public POCs for CVE-2023-40036

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III. Intelligence Information for CVE-2023-40036

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Other References for CVE-2023-40036 (1)

Same Patch Batch · notepad-plus-plus · 2023-08-25 · 4 CVEs total

CVE-2023-40031 7.8 HIGH Notepad++ vulnerable to heap buffer write overflow in Utf8_16_Read::convert
CVE-2023-40166 5.5 MEDIUM Notepad++ heap buffer read overflow in FileManager::detectLanguageFromTextBegining
CVE-2023-40164 5.5 MEDIUM Notepad++ global buffer read overflow in nsCodingStateMachine::NextState

IV. Related Vulnerabilities

Same product: notepad-plus-plus
Same vendor: notepad-plus-plus
Same weakness: CWE-120

V. Comments for CVE-2023-40036

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