Ubuntu Security Notice 3430-2 - USN-3430-1 fixed several vulnerabilities in Dnsmasq. This update provides the corresponding update for Ubuntu 12.04 ESM. A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher A discovered that Dnsmasq incorrectly handled DNS requests. A remote A attacker could use this issue to cause Dnsmasq to crash, resulting in A a denial of service, or possibly execute arbitrary code.A A Various other issues were also addressed.
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Ubuntu Security Notice USN-3430-2
October 03, 2017
dnsmasq vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in Dnsmasq.
Software Description:
- 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:
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled DNS requests. A remote
A attacker could use this issue to cause Dnsmasq to crash, resulting in
A a denial of service, or possibly execute arbitrary code.A
A (CVE-2017-14491)
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled IPv6 router
A advertisements. A remote attacker could use this issue to cause
A Dnsmasq to crash, resulting in a denial of service, or possibly
A execute arbitrary code. (CVE-2017-14492)
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled DHCPv6 requests. A remote
A attacker could use this issue to cause Dnsmasq to crash, resulting in
A a denial of service, or possibly execute arbitrary code.A
A (CVE-2017-14493)
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled DHCPv6 packets. A remote
A attacker could use this issue to possibly obtain sensitive memory
A contents. (CVE-2017-14494)
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled DNS requests. A remote
A attacker could use this issue to cause Dnsmasq to consume memory,
A resulting in a denial of service. (CVE-2017-14495)
A Felix Wilhelm, Fermin J. Serna, Gabriel Campana and Kevin Hamacher
A discovered that Dnsmasq incorrectly handled DNS requests. A remote
A attacker could use this issue to cause Dnsmasq to crash, resulting in
A 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 ESM:
A dnsmasqA A A A A A A A A A A A A A A A A A A A A A A A A 2.59-4ubuntu0.3
A dnsmasq-baseA A A A A A A A A A A A A A A A A A A A 2.59-4ubuntu0.3
A dnsmasq-utilsA A A A A A A A A A A A A A A A A A A 2.59-4ubuntu0.3
After a standard system update you need to reboot your computer to make
all the necessary changes.
References:
A https://www.ubuntu.com/usn/usn-3430-2
A https://www.ubuntu.com/usn/usn-3430-1
A CVE-2017-14491, CVE-2017-14492, CVE-2017-14493, CVE-2017-14494,
A CVE-2017-14495, CVE-2017-14496