[arch-security] [ASA-201601-7] dhcpcd: denial of service

[Levente Polyak]

Arch Linux Security Advisory ASA-201601-7
=========================================

Severity: Medium
Date    : 2016-01-11
CVE-ID  : CVE-2016-1503 CVE-2016-1504
Package : dhcpcd
Type    : denial of service
Remote  : Yes
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package dhcpcd before version 6.10.0-1 is vulnerable to denial of
service.

Resolution
==========

Upgrade to 6.10.0-1.

# pacman -Syu "dhcpcd>=6.10.0-1"

The problem has been fixed upstream in version 6.10.0.

Workaround
==========

None.

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

- CVE-2016-1503 (denial of service)

An issue has been discovered that can lead to a heap overflow via
malformed dhcp responses later in print_option (via dhcp_envoption1) due
to incorrect option length values.

- CVE-2016-1504 (denial of service)

A malformed dhcp response can lead to an invalid read/crash leading to
denial of service.

Impact
======

A remote attacker is able to send specially crafted packets leading to
application crash resulting in denial of service.

References
==========

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1503
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1504
http://article.gmane.org/gmane.comp.security.oss.general/18516

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