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Dnsmasq: Denial of Service

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201406-24 / dnsmasq
Release Date June 25, 2014
Latest Revision June 25, 2014: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-dns/dnsmasq < 2.66 >= 2.66 All supported architectures

Related bugreports: #436894, #453170

Synopsis

A vulnerability in Dnsmasq can lead to a Denial of Service condition.

2.  Impact Information

Background

Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.

Description

When used with certain libvirt configurations Dnsmasq replies to queries from prohibited interfaces.

Impact

A remote attackers can cause a Denial of Service via spoofed TCP based DNS queries.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Dnsmasq users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.66"

4.  References



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Page updated June 25, 2014

Summary: This is a Gentoo Linux Security Advisory

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