ISC DHCP: dhcpclient Remote execution of arbitrary code

Background

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

Description

The Mandriva Linux Engineering Team has reported a stack-based buffer overflow in the subnet-mask handling of dhclient.

Impact

A remote attacker might set up a rogue DHCP server in a victim’s local network, possibly leading to the execution of arbitrary code with root privileges.

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-3.1.1-r1"