GLSA 200908-08: ISC DHCP: dhcpd Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	ISC DHCP: dhcpd Denial of Service
Date:	08/18/2009
Bugs:	#275231
ID:	200908-08

Synopsis

dhcpd as included in the ISC DHCP implementation does not properly handle special conditions, leading to a Denial of Service.

Background

ISC DHCP is the reference implementation of the Dynamic Host Configuration Protocol as specified in RFC 2131.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/dhcp	< 3.1.2_p1	>= 3.1.2_p1	All supported architectures

Description

Christoph Biedl discovered that dhcpd does not properly handle certain DHCP requests when configured both using "dhcp-client-identifier" and "hardware ethernet".

Impact

A remote attacker might send a specially crafted request to dhcpd, possibly resulting in a Denial of Service (daemon crash).

Workaround

There is no known workaround at this time.

Resolution

All ISC DHCP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/dhcp-3.1.2_p1"

References

CVE-2009-1892

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200908-08.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.