CVE-2019-18934

Publication date 19 November 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially crafted answer. This issue can only be triggered if unbound was compiled with `--enable-ipsecmod` support, and ipsecmod is enabled and used in the configuration.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
unbound	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

only vulnerable if compiled with --enable-ipsecmod, which is not the case on Ubuntu

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.3 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	Low
Integrity impact	Low
Availability impact	Low

Scores

Parameter	Value
Base score	7.3 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L