Ubuntu Security Notice USN-2986-1

31st May, 2016

dosfstools vulnerabilities

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

• Ubuntu 16.04 LTS
• Ubuntu 15.10
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

dosfstools could be made to crash or run programs if it processed a
specially crafted filesystem.

Software description

• dosfstools
  – utilities for making and checking MS-DOS FAT filesystems

Details

Hanno Böck discovered that dosfstools incorrectly handled certain malformed
filesystems. A local attacker could use this issue to cause dosfstools to
crash, resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions

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

Ubuntu 16.04 LTS:

dosfstools

3.0.28-2ubuntu0.1

Ubuntu 15.10:

dosfstools

3.0.28-1ubuntu0.1

Ubuntu 14.04 LTS:

dosfstools

3.0.26-1ubuntu0.1

Ubuntu 12.04 LTS:

dosfstools

3.0.12-1ubuntu1.3

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-2015-8872,

CVE-2016-4804

Ubuntu Security Notice USN-2987-1

31st May, 2016

libgd2 vulnerabilities

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

• Ubuntu 16.04 LTS
• Ubuntu 15.10
• 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

It was discovered that the GD library incorrectly handled certain color
tables in XPM images. If a user or automated system were tricked into
processing a specially crafted XPM image, an attacker could cause a denial
of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2014-2497)

It was discovered that the GD library incorrectly handled certain malformed
GIF images. If a user or automated system were tricked into processing a
specially crafted GIF image, an attacker could cause a denial of service.
This issue only affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS.
(CVE-2014-9709)

It was discovered that the GD library incorrectly handled memory when using
gdImageFillToBorder(). A remote attacker could possibly use this issue to
cause a denial of service. (CVE-2015-8874)

It was discovered that the GD library incorrectly handled memory when using
gdImageScaleTwoPass(). A remote attacker could possibly use this issue to
cause a denial of service. This issue only applied to Ubuntu 14.04 LTS,
Ubuntu 15.10 and Ubuntu 16.04 LTS. (CVE-2015-8877)

Hans Jerry Illikainen discovered that the GD library incorrectly handled
certain malformed GD images. If a user or automated system were tricked
into processing a specially crafted GD image, an attacker could cause a
denial of service or possibly execute arbitrary code. (CVE-2016-3074)

Update instructions

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

Ubuntu 16.04 LTS:

libgd3

2.1.1-4ubuntu0.16.04.1

Ubuntu 15.10:

libgd3

2.1.1-4ubuntu0.15.10.1

Ubuntu 14.04 LTS:

libgd3

2.1.0-3ubuntu0.1

Ubuntu 12.04 LTS:

libgd2-xpm

2.0.36~rc1~dfsg-6ubuntu2.1

libgd2-noxpm

2.0.36~rc1~dfsg-6ubuntu2.1

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-2014-2497,

CVE-2014-9709,

CVE-2015-8874,

CVE-2015-8877,

CVE-2016-3074

Ubuntu Security Notice USN-2988-1

31st May, 2016

lxd vulnerabilities

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

• Ubuntu 16.04 LTS
• Ubuntu 15.10

Summary

Several security issues were fixed in LXD.

Software description

• lxd
  – Container hypervisor based on LXC

Details

Robie Basak discovered that LXD incorrectly set permissions when setting up
a loop based ZFS pool. A local attacker could use this issue to copy and
read the data of any LXD container. (CVE-2016-1581)

Robie Basak discovered that LXD incorrectly set permissions when switching
an unprivileged container into privileged mode. A local attacker could use
this issue to access any world readable path in the container directory,
including setuid binaries. (CVE-2016-1582)

Update instructions

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

Ubuntu 16.04 LTS:

lxd

2.0.2-0ubuntu1~16.04.1

Ubuntu 15.10:

lxd

0.20-0ubuntu4.2

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-2016-1581,

CVE-2016-1582