Ubuntu 12.04 LTS / 14.04 LTS / 15.04 / 15.10 : libvirt vulnerabilities (USN-2867-1)

Ubuntu Security Notice (C) 2016 Canonical, Inc. / NASL script (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

It was discovered that libvirt incorrectly handled the firewall rules
on bridge networks when the daemon was restarted. This could result in
an unintended firewall configuration. This issue only applied to
Ubuntu 12.04 LTS. (CVE-2011-4600)

Peter Krempa discovered that libvirt incorrectly handled locking when
certain ACL checks failed. A local attacker could use this issue to
cause libvirt to stop responding, resulting in a denial of service.
This issue only applied to Ubuntu 14.04 LTS. (CVE-2014-8136)

Luyao Huang discovered that libvirt incorrectly handled VNC passwords
in shapshot and image files. A remote authenticated user could use
this issue to possibly obtain VNC passwords. This issue only affected
Ubuntu 14.04 LTS. (CVE-2015-0236)

Han Han discovered that libvirt incorrectly handled volume creation
failure when used with NFS. A remote authenticated user could use this
issue to cause libvirt to crash, resulting in a denial of service.
This issue only applied to Ubuntu 15.10. (CVE-2015-5247)

Ossi Herrala and Joonas Kuorilehto discovered that libvirt incorrectly
performed storage pool name validation. A remote authenticated user
could use this issue to bypass ACLs and gain access to unintended
files. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 15.04 and
Ubuntu 15.10. (CVE-2015-5313).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected libvirt-bin and / or libvirt0 packages.

Risk factor :

Medium / CVSS Base Score : 4.3
(CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N)
CVSS Temporal Score : 3.2
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 87888 ()

Bugtraq ID:

CVE ID: CVE-2011-4600
CVE-2014-8136
CVE-2015-0236
CVE-2015-5247
CVE-2015-5313

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