#VU11489 Improper input validation in MuPDF - CVE-2018-6544

Vulnerability identifier: #VU11489

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6544

CWE-ID: CWE-20

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 target system.

The weakness exists in th pdf_load_obj_stm in pdf/pdf-xref.c due to it can reference the object stream recursively and therefore run out of error stack. A remote attacker can submit a specially crafted PDF document 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://git.ghostscript.com/?p=mupdf.git;h=26527eef77b3e51c2258c8e40845bfbc015e405d

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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.