InspIRCd: Arbitrary code execution

Background

InspIRCd (Inspire IRCd) is a modular C++ IRC daemon

Description

A vulnerability in InspIRCd allows DNS compression features to control the number of overflowed bytes sent to the heap-based buffer “res[]” in dns.cpp.

Impact

A remote attacker could send specially crafted DNS responses, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All InspIRCd users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-irc/inspircd-2.0.5-r1"