Fedora 27: Critical Dnsmasq Update For Heap Overflows And Security Issues

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

It is designed to provide DNS and, optionally, DHCP, to a small network.

It can serve the names of local machines which are not in the global

DNS. The DHCP server integrates with the DNS server and allows machines

with DHCP-allocated addresses to appear in the DNS with names configured

either in each host or in a central configuration file. Dnsmasq supports

static and dynamic DHCP leases and BOOTP for network booting of diskless

machines.

CVE-2017-14491 CVE-2017-14492 CVE-2017-14493 CVE-2017-14494 CVE-2017-14495

CVE-2017-14496

[ 1 ] Bug #1495409 - CVE-2017-14491 dnsmasq: heap overflow in the code responsible for building DNS replies

https://bugzilla.redhat.com/show_bug.cgi?id=1495409

[ 2 ] Bug #1495410 - CVE-2017-14492 dnsmasq: heap overflow in the IPv6 router advertisement code

https://bugzilla.redhat.com/show_bug.cgi?id=1495410

[ 3 ] Bug #1495411 - CVE-2017-14493 dnsmasq: stack buffer overflow in the DHCPv6 code

https://bugzilla.redhat.com/show_bug.cgi?id=1495411

[ 4 ] Bug #1495412 - CVE-2017-14494 dnsmasq: information leak in the DHCPv6 relay code

https://bugzilla.redhat.com/show_bug.cgi?id=1495412

[ 5 ] Bug #1495415 - CVE-2017-14495 dnsmasq: memory exhaustion vulnerability in the EDNS0 code

https://bugzilla.redhat.com/show_bug.cgi?id=1495415

[ 6 ] Bug #1495416 - CVE-2017-14496 dnsmasq: integer underflow leading to buffer over-read in the EDNS0 code

https://bugzilla.redhat.com/show_bug.cgi?id=1495416

su -c 'dnf upgrade dnsmasq' at the command line.

For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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