Issued:
2017-10-02
Updated:
2017-10-02

RHSA-2017:2839 - Critical: dnsmasq security update

Synopsis

Critical: dnsmasq security update

Type/Severity

Security Advisory Critical

Topic

An update for dnsmasq is now available for Red Hat Enterprise Linux 6.2 Advanced Update Support, Red Hat Enterprise Linux 6.4 Advanced Update Support, Red Hat Enterprise Linux 6.5 Advanced Update Support, Red Hat Enterprise Linux 6.5 Telco Extended Update Support, Red Hat Enterprise Linux 6.6 Advanced Update Support, Red Hat Enterprise Linux 6.6 Telco Extended Update Support, and Red Hat Enterprise Linux 6.7 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The dnsmasq packages contain Dnsmasq, a lightweight DNS (Domain Name Server) forwarder and DHCP (Dynamic Host Configuration Protocol) server.

Security Fix(es):

  • A heap buffer overflow was found in dnsmasq in the code responsible for building DNS replies. An attacker could send crafted DNS packets to dnsmasq which would cause it to crash or, potentially, execute arbitrary code. (CVE-2017-14491)

Red Hat would like to thank Felix Wilhelm (Google Security Team), Fermin J. Serna (Google Security Team), Gabriel Campana (Google Security Team), Kevin Hamacher (Google Security Team), and Ron Bowes (Google Security Team) for reporting this issue.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.7x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.7i386
Red Hat Enterprise Linux for SAP Solutions for x86_64 - Extended Update Support6.7x86_64
Red Hat Enterprise Linux for Power, big endian - Extended Update Support6.7ppc64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support6.7s390x
Red Hat Enterprise Linux Server - TUS6.6x86_64
Red Hat Enterprise Linux Server - TUS6.5x86_64
Red Hat Enterprise Linux Server - AUS6.6x86_64
Red Hat Enterprise Linux Server - AUS6.5x86_64
Red Hat Enterprise Linux Server - AUS6.4x86_64
Red Hat Enterprise Linux Server - AUS6.2x86_64
Red Hat Enterprise Linux EUS Compute Node6.7x86_64

Updated Packages

  • dnsmasq-2.48-13.el6_5.1.x86_64.rpm
  • dnsmasq-utils-2.48-14.el6_6.1.x86_64.rpm
  • dnsmasq-2.48-13.el6_5.1.src.rpm
  • dnsmasq-utils-2.48-16.el6_7.1.x86_64.rpm
  • dnsmasq-2.48-5.el6_2.2.src.rpm
  • dnsmasq-2.48-16.el6_7.1.ppc64.rpm
  • dnsmasq-debuginfo-2.48-16.el6_7.1.x86_64.rpm
  • dnsmasq-utils-2.48-16.el6_7.1.s390x.rpm
  • dnsmasq-utils-2.48-13.el6_4.1.x86_64.rpm
  • dnsmasq-2.48-14.el6_6.1.x86_64.rpm
  • dnsmasq-2.48-5.el6_2.2.x86_64.rpm
  • dnsmasq-debuginfo-2.48-13.el6_5.1.x86_64.rpm
  • dnsmasq-debuginfo-2.48-16.el6_7.1.i686.rpm
  • dnsmasq-debuginfo-2.48-5.el6_2.2.x86_64.rpm
  • dnsmasq-2.48-16.el6_7.1.src.rpm
  • dnsmasq-2.48-14.el6_6.1.src.rpm
  • dnsmasq-2.48-16.el6_7.1.x86_64.rpm
  • dnsmasq-utils-2.48-13.el6_5.1.x86_64.rpm
  • dnsmasq-utils-2.48-16.el6_7.1.ppc64.rpm
  • dnsmasq-2.48-16.el6_7.1.s390x.rpm
  • dnsmasq-2.48-13.el6_4.1.x86_64.rpm
  • dnsmasq-utils-2.48-16.el6_7.1.i686.rpm
  • dnsmasq-2.48-13.el6_4.1.src.rpm
  • dnsmasq-debuginfo-2.48-16.el6_7.1.ppc64.rpm
  • dnsmasq-2.48-16.el6_7.1.i686.rpm
  • dnsmasq-debuginfo-2.48-13.el6_4.1.x86_64.rpm
  • dnsmasq-debuginfo-2.48-14.el6_6.1.x86_64.rpm
  • dnsmasq-debuginfo-2.48-16.el6_7.1.s390x.rpm

Fixes

CVEs

References

Additional information