InspIRCd: Arbitrary code execution

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 201204-02 / InspIRCd
Release Date	April 10, 2012
Latest Revision	April 10, 2012: 1
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
net-irc/inspircd	< 2.0.5-r1	>= 2.0.5-r1	All supported architectures

Related bugreports: #409159

Synopsis

A heap-based buffer overflow in InspIRCd may allow execution of arbitrary code.

2. Impact Information

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All InspIRCd users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

CVE-2012-1836

Page updated April 10, 2012

Summary: This is a Gentoo Linux Security Advisory

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