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CVE-2021-47944— memono Notepad 4.2 Denial of Service via Buffer Overflow

Quick assessment

Affected
memono Notepad
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.

memono Notepad是memono公司的一款支持简洁记录与文本管理的轻量笔记应用。 memono Notepad 4.2版本存在安全漏洞，该漏洞源于粘贴超长字符缓冲区到笔记字段，可能导致攻击者使应用程序崩溃。

CVSS 7.5 · High EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
memono Notepad 4.2 affected
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I. Basic Information for CVE-2021-47944

Vulnerability Information
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Vulnerability Title
memono Notepad 4.2 Denial of Service via Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
memono Notepad 4.2 contains a denial of service vulnerability that allows attackers to crash the application by pasting excessively long character buffers into note fields. Attackers can generate a payload containing 350000 repeated characters and paste it twice into a new note to trigger an application crash on iOS devices.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
memono Notepad 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
memono Notepad是memono公司的一款支持简洁记录与文本管理的轻量笔记应用。 memono Notepad 4.2版本存在安全漏洞，该漏洞源于粘贴超长字符缓冲区到笔记字段，可能导致攻击者使应用程序崩溃。
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
memono Notepad 4.2 -

II. Public POCs for CVE-2021-47944

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III. Intelligence Information for CVE-2021-47944

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Vendor Advisories for CVE-2021-47944 (1)

Exploits & Public PoCs for CVE-2021-47944 (1)

IV. Related Vulnerabilities

Same weakness: CWE-789