VulnerabilityModified
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 session by connecting to the server.
CRITICAL 9.8EPSS 3.62%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.62% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284
- Affected
- redhat/libvirt · debian/debian linux
- Source
- secalert@redhat.com
References
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00054.html
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00055.html
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00024.html
- http://rhn.redhat.com/errata/RHSA-2016-2577.html
- http://security.libvirt.org/2016/0001.htmlVendor Advisory
- http://www.debian.org/security/2016/dsa-3613
- http://www.securityfocus.com/bid/91562
- https://bugzilla.redhat.com/show_bug.cgi?id=1180092
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZZMOMRXNPALA34XDF5NK363KDLAYSTL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QTQF6LXKEEMJG4VOOCIAPJAD6ACBYP4W/
- https://usn.ubuntu.com/3576-1/
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00054.html
- http://lists.opensuse.org/opensuse-updates/2016-07/msg00055.html
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00024.html
- http://rhn.redhat.com/errata/RHSA-2016-2577.html
- http://security.libvirt.org/2016/0001.htmlVendor Advisory
- http://www.debian.org/security/2016/dsa-3613
- http://www.securityfocus.com/bid/91562
- https://bugzilla.redhat.com/show_bug.cgi?id=1180092
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZZMOMRXNPALA34XDF5NK363KDLAYSTL/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QTQF6LXKEEMJG4VOOCIAPJAD6ACBYP4W/
- https://usn.ubuntu.com/3576-1/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.