libvirt: Setting empty VNC password allows access to unauthorized users
Published Jul 13, 2016
9.8
CRITICALCVSS 3.0
EPSS 3.65%
Description
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.
Affected products
No data.
Configuration 2
- 8.0
No data.
Red Hat Enterprise Linux 7
libvirt-0:2.0.0-10.el7
Fixed · RHSA-2016:2577
Red Hat Gluster Storage 3.1 for RHEL 7
libvirt-0:2.0.0-10.el7
Fixed · RHSA-2016:2577
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
libvirt-0:2.0.0-10.el7
Fixed · RHSA-2016:2577
Red Hat Enterprise Linux 5
libvirt
Not affected
Red Hat Enterprise Linux 6
libvirt
Will not fix
Red Hat Enterprise Virtualization 3
mingw-virt-viewer
Under investigation
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | libvirt-0:2.0.0-10.el7 | Fixed | RHSA-2016:2577 |
| Red Hat Gluster Storage 3.1 for RHEL 7 | libvirt-0:2.0.0-10.el7 | Fixed | RHSA-2016:2577 |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 | libvirt-0:2.0.0-10.el7 | Fixed | RHSA-2016:2577 |
| Red Hat Enterprise Linux 5 | libvirt | Not affected | n/a |
| Red Hat Enterprise Linux 6 | libvirt | Will not fix | n/a |
| Red Hat Enterprise Virtualization 3 | mingw-virt-viewer | Under investigation | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.65% (0.03653) | 89.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.64% (0.03636) | 88.05th | v5 (v2026.06.15) |
| Jul 13, 2025 | 2.53% (0.02531) | 84.79th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.00% (0.00999) | 74.96th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.04% (0.02036) | 73.04th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.00% (0.00999) | 75.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.74% (0.02736) | 90.91th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.74% (0.02736) | 88.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Feb 13, 2023 | 2.17% (0.02172) | 80.28th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (15)
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00054.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00055.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00024.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2016-2577.html vendor-advisoryx_refsource_REDHAT
- http://security.libvirt.org/2016/0001.html x_refsource_CONFIRMVendor Advisory
- http://www.debian.org/security/2016/dsa-3613 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/91562 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-5008 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1180092 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=1351514 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZZMOMRXNPALA34XDF5NK363KDLAYSTL/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QTQF6LXKEEMJG4VOOCIAPJAD6ACBYP4W/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2016-5008
- https://usn.ubuntu.com/3576-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2016-5008
Change history (0)
No recorded changes yet.