Ubuntu Security Notice USN-3116-1

1st November, 2016

dbus vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in DBus.

Software description

• dbus
  – simple interprocess messaging system

Details

It was discovered that DBus incorrectly validated the source of
ActivationFailure signals. A local attacker could use this issue to cause a
denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu
14.04 LTS. (CVE-2015-0245)

It was discovered that DBus incorrectly handled certain format strings. A
local attacker could use this issue to cause a denial of service, or
possibly execute arbitrary code. This issue is only exposed to unprivileged
users when the fix for CVE-2015-0245 is not applied, hence this issue is
only likely to affect Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Ubuntu 16.04
LTS and Ubuntu 16.10 have been updated as a preventative measure in the
event that a new attack vector for this issue is discovered.
(No CVE number)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.10:

dbus

1.10.10-1ubuntu1.1

libdbus-1-3

1.10.10-1ubuntu1.1

Ubuntu 16.04 LTS:

dbus

1.10.6-1ubuntu3.1

libdbus-1-3

1.10.6-1ubuntu3.1

Ubuntu 14.04 LTS:

dbus

1.6.18-0ubuntu4.4

libdbus-1-3

1.6.18-0ubuntu4.4

Ubuntu 12.04 LTS:

dbus

1.4.18-1ubuntu1.8

libdbus-1-3

1.4.18-1ubuntu1.8

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

CVE-2015-0245

Ubuntu Security Notice USN-3117-1

1st November, 2016

libgd2 vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

The GD library could be made to crash or run programs if it processed a
specially crafted image file.

Software description

• libgd2
  – GD Graphics Library

Details

Ibrahim El-Sayed discovered that the GD library incorrectly handled certain
malformed Tiff images. If a user or automated system were tricked into
processing a specially crafted Tiff image, an attacker could cause a denial
of service. (CVE-2016-6911)

Ke Liu discovered that the GD library incorrectly handled certain integers
when processing WebP images. If a user or automated system were tricked
into processing a specially crafted WebP image, an attacker could cause a
denial of service, or possibly execute arbitrary code. This issue only
applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10.
(CVE-2016-7568)

Emmanuel Law discovered that the GD library incorrectly handled certain
strings when creating images. If a user or automated system were tricked
into processing a specially crafted image, an attacker could cause a denial
of service, or possibly execute arbitrary code. (CVE-2016-8670)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.10:

libgd3

2.2.1-1ubuntu3.2

Ubuntu 16.04 LTS:

libgd3

2.1.1-4ubuntu0.16.04.5

Ubuntu 14.04 LTS:

libgd3

2.1.0-3ubuntu0.5

Ubuntu 12.04 LTS:

libgd2-xpm

2.0.36~rc1~dfsg-6ubuntu2.3

libgd2-noxpm

2.0.36~rc1~dfsg-6ubuntu2.3

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2016-6911,

CVE-2016-7568,

CVE-2016-8670

Ubuntu Security Notice USN-3118-1

1st November, 2016

mailman vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in Mailman.

Software description

• mailman
  – Powerful, web-based mailing list manager

Details

It was discovered that the Mailman administrative web interface did not
protect against cross-site request forgery (CSRF) attacks. If an
authenticated user were tricked into visiting a malicious website while
logged into Mailman, a remote attacker could perform administrative
actions. This issue only affected Ubuntu 12.04 LTS. (CVE-2016-7123)

Nishant Agarwala discovered that the Mailman user options page did not
protect against cross-site request forgery (CSRF) attacks. If an
authenticated user were tricked into visiting a malicious website while
logged into Mailman, a remote attacker could modify user options.
(CVE-2016-6893)

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.10:

mailman

1:2.1.22-1ubuntu0.1

Ubuntu 16.04 LTS:

mailman

1:2.1.20-1ubuntu0.1

Ubuntu 14.04 LTS:

mailman

1:2.1.16-2ubuntu0.2

Ubuntu 12.04 LTS:

mailman

1:2.1.14-3ubuntu0.4

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2016-6893,

CVE-2016-7123

Ubuntu Security Notice USN-3119-1

1st November, 2016

bind9 vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

Bind could be made to crash if it received specially crafted network
traffic.

Software description

• bind9
  – Internet Domain Name Server

Details

Tony Finch and Marco Davids discovered that Bind incorrectly handled
certain responses containing a DNAME answer. A remote attacker could
possibly use this issue to cause Bind to crash, resulting in a denial of
service.

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.10:

bind9

1:9.10.3.dfsg.P4-10.1ubuntu1.1

Ubuntu 16.04 LTS:

bind9

1:9.10.3.dfsg.P4-8ubuntu1.2

Ubuntu 14.04 LTS:

bind9

1:9.9.5.dfsg-3ubuntu0.10

Ubuntu 12.04 LTS:

bind9

1:9.8.1.dfsg.P1-4ubuntu0.19

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

CVE-2016-8864