Arch Linux: 201803-2 High: mkinitcpio-busybox Code Execution Threat

Arch Linux Security Advisory ASA-201803-2
========================================
Severity: High
Date    : 2018-03-01
CVE-ID  : CVE-2017-16544
Package : mkinitcpio-busybox
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-514

Summary
======
The package mkinitcpio-busybox before version 1.28.1-1 is vulnerable to
arbitrary code execution.

Resolution
=========
Upgrade to 1.28.1-1.

# pacman -Syu "mkinitcpio-busybox>=1.28.1-1"

The problem has been fixed upstream in version 1.28.1.

Workaround
=========
None.

Description
==========
In the add_match function in libbb/lineedit.c in BusyBox through
1.27.2, the tab autocomplete feature of the shell, used to get a list
of filenames in a directory, does not sanitize filenames and results in
executing any escape sequence in the terminal. This could potentially
result in code execution, arbitrary file writes, or other attacks.

Impact
=====
An attacker is able to execute arbitrary code by tricking the user into
auto-completing a crafted filename.

References
=========
https://bugs.archlinux.org/task/56391

https://www.paloaltonetworks.com/prisma/cloud
https://security.archlinux.org/CVE-2017-16544