GLSA 200507-16: dhcpcd: Denial of Service vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	dhcpcd: Denial of Service vulnerability
Date:	07/15/2005
Bugs:	#98394
ID:	200507-16

Synopsis

A vulnerability in dhcpcd may cause the dhcpcd daemon to crash.

Background

dhcpcd is a standards compliant DHCP client daemon. It requests an IP address and other information from the DHCP server, automatically configures the network interface, and tries to renew the lease time.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/dhcpcd	< 1.3.22_p4-r11	>= 1.3.22_p4-r11	All supported architectures

Description

infamous42md discovered that dhcpcd can be tricked to read past the end of the supplied DHCP buffer. As a result, this might lead to a crash of the daemon.

Impact

With a malicious DHCP server an attacker could cause a Denial of Service by crashing the DHCP client.

Workaround

There is no known workaround at this time.

Resolution

All dhcpcd users should upgrade to the latest available version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/dhcpcd-1.3.22_p4-r11"

References

CAN-2005-1848

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200507-16.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.