1. Ubuntu Security Notices
  2. USN-3430-1

USN-3430-1: Dnsmasq vulnerabilities

Publication date

2 October 2017

Overview

Several security issues were fixed in Dnsmasq.

Releases

Packages

  • dnsmasq - Small caching DNS proxy and DHCP/TFTP server

Details

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker
could use this issue to cause Dnsmasq to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2017-14491)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled IPv6 router advertisements. A
remote attacker could use this issue to cause Dnsmasq to crash, resulting
in a denial of service, or possibly execute arbitrary code.
(CVE-2017-14492)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote
attacker could use this issue to cause Dnsmasq to crash, resulting in a
denial of service, or possibly execute arbitrary code. (

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker
could use this issue to cause Dnsmasq to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2017-14491)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled IPv6 router advertisements. A
remote attacker could use this issue to cause Dnsmasq to crash, resulting
in a denial of service, or possibly execute arbitrary code.
(CVE-2017-14492)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote
attacker could use this issue to cause Dnsmasq to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2017-14493)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DHCPv6 packets. A remote
attacker could use this issue to possibly obtain sensitive memory contents.
(CVE-2017-14494)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker
could use this issue to cause Dnsmasq to consume memory, resulting in a
denial of service. (CVE-2017-14495)

Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
discovered that Dnsmasq incorrectly handled DNS requests. A remote attacker
could use this issue to cause Dnsmasq to crash, resulting in a denial of
service. (CVE-2017-14496)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
17.04 zesty dnsmasq –  2.76-5ubuntu0.1
dnsmasq-base –  2.76-5ubuntu0.1
dnsmasq-utils –  2.76-5ubuntu0.1
16.04 xenial dnsmasq –  2.75-1ubuntu0.16.04.3
dnsmasq-base –  2.75-1ubuntu0.16.04.3
dnsmasq-utils –  2.75-1ubuntu0.16.04.3
14.04 trusty dnsmasq –  2.68-1ubuntu0.2
dnsmasq-base –  2.68-1ubuntu0.2
dnsmasq-utils –  2.68-1ubuntu0.2

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References

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