ISC DHCP: Denial of service

Background

ISC DHCP is ISC’s reference implementation of all aspects of the Dynamic Host Configuration Protocol.

Description

A buffer overflow error was found in ISC DHCP server, that can only be exploited under unusual server configurations where the DHCP server is configured to provide clients with a large set of DHCP options.

Impact

A remote attacker could exploit this vulnerability to cause a Denial of Service.

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"