CVE-2017-15107 Security feature bypass in dnsmasq

High 7.5 Published 23 Jan 2018 Updated 5 Aug 2024

Attackers can bypass DNSSEC validation to spoof hostnames, affecting Dnsmasq users relying on secure DNS resolution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2017-15107?

CVE-2017-15107 is a high-severity vulnerability in Simon Kelley dnsmasq, published on 23 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-358

Which versions are affected by CVE-2017-15107?

It affects 1 product.

Linux distribution packages (11)

`dnsmasq` SUSE:HPE Helion OpenStack 8	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Desktop 12 SP3	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Desktop 12 SP4	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Server 11 SP4-LTSS	All versions	`2.78-0.17.10.1`
`dnsmasq` SUSE:Linux Enterprise Server 12 SP3	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Server 12 SP4	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Server for SAP Applications 12 SP3	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:Linux Enterprise Server for SAP Applications 12 SP4	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:OpenStack Cloud 7	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:OpenStack Cloud 8	All versions	`2.78-18.6.1`
`dnsmasq` SUSE:OpenStack Cloud Crowbar 8	All versions	`2.78-18.6.1`

Products include Thekelleys Dnsmasq.

How do I fix CVE-2017-15107?

Upgrade to a fixed version.

Is CVE-2017-15107 being exploited?

There is no known exploitation of CVE-2017-15107 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2017-15107, CLEANSTART-2026-ND09534, DEBIAN-CVE-2017-15107, GHSA-f999-2m22-345j, SUSE-SU-2019:14190-1, SUSE-SU-2019:1721-1 and 1 more.