#VU35831 NULL pointer dereference in MuPDF - CVE-2019-7321

Vulnerability identifier: #VU35831

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-7321

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MuPDF
Client/Desktop applications / Multimedia software

Vendor: Artifex Software, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Usage of an uninitialized variable in the function fz_load_jpeg in Artifex MuPDF 1.14 can result in a heap overflow vulnerability that allows an attacker to execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

MuPDF: 1.14.0

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External links
https://github.com/ereisr00/bagofbugz/tree/master/MuPDF/700560

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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.