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TI-2018-04940 Aliases CVE-2018-6764GHSA-37fp-qc5g-vpxr

util/virlog.c in libvirt does not properly determine the hostname on LXC container…

Priority LOW 34CWE-346Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-346.

Summary

util/virlog.c in libvirt does not properly determine the hostname on LXC container startup, which allows local guest OS users to bypass an intended container protection mechanism and execute arbitrary commands via a crafted NSS module.

Why it matters now

EPSS 0.00325 25th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

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 · 10

CPEVersionsRoleVendor
cpe:2.3:a:redhat:libvirt:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*4.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
  • cpe:2.3:a:redhat:libvirt:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical

Remediation

Red Hat 1 advisory

  • RHSA-2018:3113 Released 2018-10-30 · Red Hat rating Moderate
    libvirt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) libvirt-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7, libvirt-client-4.5.0-10.el7 +21
    • Red Hat Enterprise Linux Client Optional (v. 7) libvirt-admin-4.5.0-10.el7, libvirt-daemon-lxc-4.5.0-10.el7, libvirt-devel-4.5.0-10.el7 +4
    • Red Hat Enterprise Linux ComputeNode (v. 7) libvirt-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7, libvirt-client-4.5.0-10.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libvirt-4.5.0-10.el7, libvirt-admin-4.5.0-10.el7, libvirt-daemon-4.5.0-10.el7 +25
    • Red Hat Enterprise Linux Server (v. 7) libvirt-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7, libvirt-client-4.5.0-10.el7 +26
    • Red Hat Enterprise Linux Server Optional (v. 7) libvirt-admin-4.5.0-10.el7, libvirt-daemon-lxc-4.5.0-10.el7, libvirt-lock-sanlock-4.5.0-10.el7 +3
    • Red Hat Enterprise Linux Workstation (v. 7) libvirt-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7, libvirt-client-4.5.0-10.el7 +23
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libvirt-admin-4.5.0-10.el7, libvirt-daemon-lxc-4.5.0-10.el7, libvirt-lock-sanlock-4.5.0-10.el7 +2
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) libvirt-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7, libvirt-client-4.5.0-10.el7 +21
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) libvirt-4.5.0-10.el7, libvirt-admin-4.5.0-10.el7, libvirt-bash-completion-4.5.0-10.el7 +26

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3113
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3113
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8
  • Red Hat Storage 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-6764
  2. 2026-10-03 Alias added: GHSA-37fp-qc5g-vpxr

References

Patch 1

Advisory 3

Sources

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