Debian DSA-4003-1 : libvirt - security update

high Nessus Plugin ID 103994

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Synopsis

The remote Debian host is missing a security-related update.

Description

Daniel P. Berrange reported that Libvirt, a virtualisation abstraction library, does not properly handle the default_tls_x509_verify (and related) parameters in qemu.conf when setting up TLS clients and servers in QEMU, resulting in TLS clients for character devices and disk devices having verification turned off and ignoring any errors while validating the server certificate.

More informations in https://security.libvirt.org/2017/0002.html .

Solution

Upgrade the libvirt packages.

For the stable distribution (stretch), this problem has been fixed in version 3.0.0-4+deb9u1.

Plugin Details

Severity: High

ID: 103994

File Name: debian_DSA-4003.nasl

Version: 3.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/20/2017

Updated: 11/18/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2017-1000256

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:libvirt

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2017

Reference Information

CVE: CVE-2017-1000256

DSA: 4003

Detections

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