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Dnsmasq: Denial of Service


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


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

2.  Impact Information


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


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


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

3.  Resolution Information


There is no known workaround at this time.


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


Page updated June 25, 2014

Summary: This is a Gentoo Linux Security Advisory

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