[ASA-201801-29] libmupdf: arbitrary code execution

[Levente Polyak]

Arch Linux Security Advisory ASA-201801-29
==========================================

Severity: High
Date    : 2018-01-30
CVE-ID  : CVE-2017-17858
Package : libmupdf
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-599

Summary
=======

The package libmupdf before version 1.12.0-2 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 1.12.0-2.

# pacman -Syu "libmupdf>=1.12.0-2"

The problem has been fixed upstream but no release is available yet.

Workaround
==========

None.

Description
===========

Heap-based buffer overflow in the ensure_solid_xref function in
pdf/pdf-xref.c in Artifex MuPDF 1.12.0 allows an attacker to
potentially execute arbitrary code via a crafted PDF file, because xref
subsection object numbers are unrestricted.

Impact
======

An attacker is able to execute arbitrary code on the affected host by
tricking the user to open or process a maliciously crafted PDF
document.

References
==========

https://git.ghostscript.com/?p=mupdf.git;a=commitdiff;h=55c3f68d638ac1263a386e0aaa004bb6e8bde731
https://bugs.ghostscript.com/show_bug.cgi?id=698819
https://github.com/mzet-/Security-Advisories/blob/master/mzet-adv-2017-01.md
https://security.archlinux.org/CVE-2017-17858

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