Published: 31/10/2017 Updated: 07/11/2023

CVSS v2 Base Score: 6.8 | Impact Score: 6.4 | Exploitability Score: 8.6

CVSS v3 Base Score: 8.1 | Impact Score: 5.9 | Exploitability Score: 2.2

VMScore: 605

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

libvirt version 2.3.0 and later is vulnerable to a bad default configuration of "verify-peer=no" passed to QEMU by libvirt resulting in a failure to validate SSL/TLS certificates by default.

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redhat libvirt
debian debian linux 9.0

Debian Bug report logs - #878799 CVE-2017-1000256/LSN-2017-0002: TLS certificate verification disabled for clients Package: src:libvirt; Maintainer for src:libvirt is Debian Libvirt Maintainers <pkg-libvirt-maintainers@listsaliothdebianorg>; Reported by: Guido Günther <agx@sigxcpuorg> Date: Mon, 16 Oct 2017 17:36 ...

Several security issues were fixed in libvirt ...

Daniel P Berrange reported that Libvirt, a virtualisation abstraction library, does not properly handle the default_tls_x509_verify (and related) parameters in qemuconf 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 valid ...

libvirt version 230 and later is vulnerable to a bad default configuration of "verify-peer=no" passed to QEMU by libvirt resulting in a failure to validate SSL/TLS certificates by default ...

CWE-295 https://www.redhat.com/archives/libvirt-announce/2017-October/msg00001.html https://access.redhat.com/security/cve/CVE-2017-1000256 http://www.debian.org/security/2017/dsa-4003 https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1556251.html https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878799 https://usn.ubuntu.com/3576-1/https://nvd.nist.gov

CVE-2017-1000256

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