Input validation error in Dnsmasq - CVE-2017-15107

Vulnerability identifier: #VU33708

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-15107

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to manipulate data.

A vulnerability was found in the implementation of DNSSEC in Dnsmasq up to and including 2.78. Wildcard synthesized NSEC records could be improperly interpreted to prove the non-existence of hostnames that actually exist.

Dnsmasq
Arch Linux
Opensuse
Ubuntu
Fedora
dnsmasq (Alpine package)
dnsmasq (Ubuntu package)
dnsmasq-base (Ubuntu package)
dnsmasq-utils (Ubuntu package)
dnsmasq

Install update from vendor's website.

dnsmasq (Alpine package) - update to 2.76-r3
dnsmasq (Ubuntu package) - update to 2.75-1ubuntu0.16.04.10
dnsmasq-base (Ubuntu package) - update to 2.75-1ubuntu0.16.04.10
dnsmasq-utils (Ubuntu package) - update to 2.75-1ubuntu0.16.04.10
dnsmasq - addressed in versions 2.76-6.fc26, 2.78-2.fc27

• http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00027.html
• http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2018q1/011896.html
• http://www.securityfocus.com/bid/102812

• Input validation error in GNU Dnsmasq
• OpenSUSE Linux update for dnsmasq
• Input validation error in dnsmasq (Alpine package)
• Arch Linux update for dnsmasq
• Ubuntu update for dnsmasq
• Fedora 26 update for dnsmasq
• Fedora 27 update for dnsmasq