#VU12557 Infinite loop in MuPDF - CVE-2018-5686

Vulnerability identifier: #VU12557

Vulnerability risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5686

CWE-ID: CWE-835

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MuPDF
Client/Desktop applications / Multimedia software

Vendor: Artifex Software, Inc.

Description
The vulnerability allows a remote attacker to cause DoS condition on the traget system.

The weakness exists in the pdf_parse_array function in pdf/pdf-parse.c due to infinite loop because EOF is not considered. A remote attacker can trick the victim into opening a specially crafted pdf file and cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MuPDF: 1.12.0

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External links
https://bugs.ghostscript.com/show_bug.cgi?id=698860

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.