#VU33157 Heap-based buffer overflow in MuPDF - CVE-2017-5896

Vulnerability identifier: #VU33157

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-5896

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
MuPDF
Client/Desktop applications / Multimedia software

Vendor: Artifex Software, Inc.

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Heap-based buffer overflow in the fz_subsample_pixmap function in fitz/pixmap.c in MuPDF 1.10a. A remote attacker can use a crafted image. to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 1.10rc1.

Vulnerable software versions

MuPDF: 1.10a

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External links
https://git.ghostscript.com/?p=mupdf.git;h=2c4e5867ee699b1081527bc6c6ea0e99a35a5c27
https://www.debian.org/security/2017/dsa-3797
https://www.openwall.com/lists/oss-security/2017/02/06/3
https://www.openwall.com/lists/oss-security/2017/02/07/1
https://www.securityfocus.com/bid/96139
https://bugs.ghostscript.com/show_bug.cgi?id=697515
https://security.gentoo.org/glsa/201702-12

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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