USN-3430-2: Dnsmasq vulnerabilities
3 October 2017
Several security issues were fixed in Dnsmasq.
Releases
Packages
- dnsmasq - Small caching DNS proxy and DHCP/TFTP server
Details
USN-3430-1 fixed several vulnerabilities in Dnsmasq. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory 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. (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
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.04
After a standard system update you need to reboot your computer to make
all the necessary changes.