Subject: [ASA-201711-13] libzip: arbitrary code execution

Arch Linux Security Advisory ASA-201711-13
==========================================

Severity: High
Date    : 2017-11-07
CVE-ID  : CVE-2017-12858
Package : libzip
Type    : arbitrary code execution
Remote  : Yes
Link    : https://security.archlinux.org/AVG-390

Summary
=======

The package libzip before version 1.3.0-1 is vulnerable to arbitrary
code execution.

Resolution
==========

Upgrade to 1.3.0-1.

# pacman -Syu "libzip>=1.3.0-1"

The problem has been fixed upstream in version 1.3.0.

Workaround
==========

None.

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

Double free vulnerability in the _zip_dirent_read function in
zip_dirent.c in libzip allows attackers to execute arbitrary code via a
crafted zip file.

Impact
======

A remote attacker can execute arbitrary code on the affected host by
tricking the user or an application using libzip into opening a crafted
zip file.

References
==========

https://github.com/nih-at/libzip/commit/2217022b7d1142738656d891e00b3d2d9179b796
https://security.archlinux.org/CVE-2017-12858