CVE-2017-15107

Publication date 23 January 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
dnsmasq	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Fixed 2.75-1ubuntu0.16.04.10
	14.04 LTS trusty	Not affected

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
dnsmasq	Upstream: http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=4fe6744a220eddd3f1749b40cac3dfc510787de6 Upstream: http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=cd7df612b14ec1bf831a966ccaf076be0dae7404

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-4924-1
Dnsmasq vulnerabilities
22 April 2021