OSSN/OSSN-0082

Summary
A series of heap and stack based buffer overflows have been discovered in versions of dnsmasq prior to release 2.78.

Affected Services / Software
Any neutron based OpenStack deployment on a version of dnsmasq prior to 2.78.

Discussion
The following attack vectors have been assigned the following CVE numbers.


 * CVE-2017-14491
 * CVE-2017-14492
 * CVE-2017-14493
 * CVE-2017-14494
 * CVE-2017-14495
 * CVE-2017-14496
 * CVE-2017-13704

Each of these CVE's exposes a neutron based OpenStack deployment to various attacks such as leakage of sensitive memory information or causing a denial of service. Nodes are exposed to this risk by the crafting of various nefarious DNS or DHCP requests.

Recommended Actions
Operators should update the dnsmasq service using the affected nodes operating systems packaging tools to version 2.78 and later, or a distribution packaged version that contains relevant backports for these vulnerabilities.

Contacts / References
Author: Luke Hinds, Red Hat

This OSSN : https://wiki.openstack.org/wiki/OSSN/OSSN-0082

Original Launchpad Bug: https://bugs.launchpad.net/neutron/+bug/1721063

Mailing List : [Security] tag on openstack-dev@lists.openstack.org

OpenStack Security Project : https://launchpad.net/~openstack-ossg