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TI-2016-04328 Aliases CVE-2016-5008GHSA-qmg9-jp26-j65g

libvirt before 2.0.0 improperly disables password checking when the password on a VNC…

Priority MEDIUM 48CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 10 fixed, 2 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-284.

Summary

libvirt before 2.0.0 improperly disables password checking when the password on a VNC server is set to an empty string, which allows remote attackers to bypass authentication and establish a VNC session by connecting to the server.

Why it matters now

EPSS 0.03653 89th percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 10 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:*up to 1.3.5VulnerableRed Hat
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
  • cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* Versions up to 1.3.5 Vulnerable ·Red Hat
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

Red Hat 1 advisory

  • RHSA-2016:2577 Released 2016-11-03 · Red Hat rating Moderate
    libvirt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libvirt-2.0.0-10.el7, libvirt-client-2.0.0-10.el7, libvirt-daemon-2.0.0-10.el7 +11
    • Red Hat Enterprise Linux Client Optional (v. 7) libvirt-daemon-lxc-2.0.0-10.el7, libvirt-devel-2.0.0-10.el7, libvirt-docs-2.0.0-10.el7 +3
    • Red Hat Enterprise Linux ComputeNode (v. 7) libvirt-2.0.0-10.el7, libvirt-client-2.0.0-10.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt-2.0.0-10.el7, libvirt-daemon-2.0.0-10.el7, libvirt-daemon-config-network-2.0.0-10.el7 +16
    • Red Hat Enterprise Linux Server (v. 7) libvirt-2.0.0-10.el7, libvirt-client-2.0.0-10.el7, libvirt-client-2.0.0-10.el7.ppc +15
    • Red Hat Enterprise Linux Server Optional (v. 7) libvirt-daemon-kvm-2.0.0-10.el7, libvirt-daemon-lxc-2.0.0-10.el7, libvirt-lock-sanlock-2.0.0-10.el7 +3
    • Red Hat Enterprise Linux Workstation (v. 7) libvirt-2.0.0-10.el7, libvirt-client-2.0.0-10.el7, libvirt-daemon-2.0.0-10.el7 +13
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-daemon-lxc-2.0.0-10.el7, libvirt-lock-sanlock-2.0.0-10.el7, libvirt-login-shell-2.0.0-10.el7 +1
    • Red Hat Gluster Storage Server 3.1 on RHEL-7 libvirt-daemon-lxc-2.0.0-10.el7, libvirt-lock-sanlock-2.0.0-10.el7, libvirt-login-shell-2.0.0-10.el7
    • Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts libvirt-2.0.0-10.el7, libvirt-daemon-kvm-2.0.0-10.el7, libvirt-lock-sanlock-2.0.0-10.el7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Virtualization 3Affected—
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:2577
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:2577
Red Hat Gluster Storage Server 3.1 on RHEL-7Fixed RHSA-2016:2577
Red Hat Virtualization 4 Management Agent for RHEL 7 HostsFixed RHSA-2016:2577
Not affected: 1 product
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-5008
  2. 2026-10-03 Alias added: GHSA-qmg9-jp26-j65g

References

Advisory 9

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences