Arch Linux: ASA-202310-7 Important: dhcpcd Remote Command Injection

Arch Linux Security Advisory ASA-201410-8
========================================
Severity: Critical
Date    : 2014-10-20
CVE-ID  : CVE-2014-3686
Package : wpa_supplicant, hostapd
Type    : Arbitrary command execution
Remote  : yes
Link    : https://wiki.archlinux.org/title/CVE-2014

Summary
======
The package wpa_supplicant and hostapd before version 2.3-1 are
vulnerable to arbitrary command execution.

Resolution
=========
Upgrade to 2.3-1.

# pacman -Syu "wpa_supplicant>=2.3-1" "hostapd>=2.3-1"

The problem has been fixed upstream in version 2.3.

Workaround
=========
Disable use of wpa_cli/hostapd_cli command to run action scripts (this
may break functionality).

Description
==========
Jouni Malinen discovered an input sanitization issue in the wpa_cli and
hostapd_cli tools included in the wpa_supplicant and hostapd packages. A
remote wifi system within range could provide a crafted frame triggering
arbitrary command execution under the privileges of the
wpa_cli/hostapd_cli process.

Impact
=====
A remote attacker is able to perform arbitrary command execution with
the with privileges of the affected process.

References
=========
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-3686
https://bugs.archlinux.org/task/42401
https://www.openwall.com/lists/oss-security/2014/10/09/28
http://w1.fi/security/2014-1/