ISC DHCP: Multiple vulnerabilities

Background

ISC DHCP is a Dynamic Host Configuration Protocol (DHCP) client/server.

Description

Multiple vulnerabilities have been discovered in ISC DHCP. Please review the CVE identifiers referenced below for details.

Impact

Remote attackers could execute arbitrary code, cause a Denial of Service condition, or have other unspecified impacts.

Workaround

There are no known workarounds at this time for CVE-2018-5732 or CVE-2018-5733.

In accordance with upstream documentation, the recommended workaround for CVE-2017-3144 is, “to disallow access to the OMAPI control port from unauthorized clients (in accordance with best practices for server operation).”

Resolution

All DHCP users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/dhcp-4.3.6_p1"