Vulnerabilities
Misconfiguration
Runtime Security
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CVE Vulnerabilities

CVE-2016-5008

Improper Access Control

Published: Jul 13, 2016 | Modified: Feb 12, 2023
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
5.1 MODERATE
AV:N/AC:H/Au:N/C:P/I:P/A:P
RedHat/V3
5.6 MODERATE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Ubuntu
LOW
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-5008
CWEhttps://cwe.mitre.org/data/definitions/284.html

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.

Weakness

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Affected Software

Name Vendor Start Version End Version
Libvirt Redhat * 1.3.5 (including)
Red Hat Enterprise Linux 7 RedHat libvirt-0:2.0.0-10.el7 *
Red Hat Gluster Storage 3.1 for RHEL 7 RedHat libvirt-0:2.0.0-10.el7 *
Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 RedHat libvirt-0:2.0.0-10.el7 *
Libvirt Ubuntu artful *
Libvirt Ubuntu bionic *
Libvirt Ubuntu cosmic *
Libvirt Ubuntu devel *
Libvirt Ubuntu disco *
Libvirt Ubuntu eoan *
Libvirt Ubuntu focal *
Libvirt Ubuntu groovy *
Libvirt Ubuntu hirsute *
Libvirt Ubuntu precise *
Libvirt Ubuntu precise/esm *
Libvirt Ubuntu trusty *
Libvirt Ubuntu upstream *
Libvirt Ubuntu wily *
Libvirt Ubuntu xenial *
Libvirt Ubuntu yakkety *
Libvirt Ubuntu zesty *

Extended Description

Access control involves the use of several protection mechanisms such as:

When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses:

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References

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