CVE-2016-5008
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.65% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 89.2% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-07-13 15:00Z10 YR AGO
- Last updated
- 2024-08-06 00:46Z2 YR AGO
- Reserved
- 2016-05-24
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-284Improper Access ControlPillar
- Data version
- 5.1
- Document digest
- 647ebfd8c8a789e976a3d8f8befe66e54ce71dc1a2a30b096c0d61328d76db13
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1180092
- lists.fedoraproject.orgFEDORA-2016-65cc608ebehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZZMOMRXNPALA34XDF5NK363KDLAYSTL/
- www.debian.orgDSA-3613http://www.debian.org/security/2016/dsa-3613
- www.securityfocus.com91562http://www.securityfocus.com/bid/91562
- security.libvirt.orghttp://security.libvirt.org/2016/0001.html
- lists.opensuse.orgopenSUSE-SU-2016:1810http://lists.opensuse.org/opensuse-updates/2016-07/msg00055.html
- lists.fedoraproject.orgFEDORA-2016-7b7e16a39ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QTQF6LXKEEMJG4VOOCIAPJAD6ACBYP4W/
- lists.opensuse.orgopenSUSE-SU-2016:1975http://lists.opensuse.org/opensuse-updates/2016-08/msg00024.html
- lists.opensuse.orgopenSUSE-SU-2016:1809http://lists.opensuse.org/opensuse-updates/2016-07/msg00054.html
- rhn.redhat.comRHSA-2016:2577http://rhn.redhat.com/errata/RHSA-2016-2577.html
- usn.ubuntu.comUSN-3576-1https://usn.ubuntu.com/3576-1/
07 Fixed in
Debian 12
- libvirt Fixed in 2.0.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libvirt Fixed in 2.0.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libvirt Fixed in 2.0.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- libvirt Fixed in 1.2.2-0ubuntu13.1.26
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- libvirt Fixed in 1.3.1-1ubuntu10.19
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.