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USN-3075-1: Imlib2 vulnerabilities

USN-3075-1: Imlib2 vulnerabilities

Ubuntu Security Notice USN-3075-1

8th September, 2016

imlib2 vulnerabilities

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

Summary

Several security issues were fixed in Imlib2.

Software description

Details

Jakub Wilk discovered an out of bounds read in the GIF loader
implementation in Imlib2. An attacker could use this to cause a
denial of service (application crash) or possibly obtain sensitive
information. (CVE-2016-3994)

Yuriy M. Kaminskiy discovered an off-by-one error when handling
coordinates in Imlib2. An attacker could use this to cause a denial of
service (application crash). (CVE-2016-3993)

Yuriy M. Kaminskiy discovered that integer overflows existed in Imlib2
when handling images with large dimensions. An attacker could use
this to cause a denial of service (memory exhaustion or application
crash). (CVE-2014-9771, CVE-2016-4024)

Kevin Ryde discovered that the ellipse drawing code in Imlib2 would
attempt to divide by zero when drawing a 2×1 ellipse. An attacker
could use this to cause a denial of service (application crash).
(CVE-2011-5326)

It was discovered that Imlib2 did not properly handled GIF images
without colormaps. An attacker could use this to cause a denial of
service (application crash). This issue only affected Ubuntu 12.04 LTS
and Ubuntu 14.04 LTS. (CVE-2014-9762)

It was discovered that Imlib2 did not properly handle some PNM images,
leading to a division by zero. An attacker could use this to cause
a denial of service (application crash). This issue only affected
Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9763)

It was discovered that Imlib2 did not properly handle error conditions
when loading some GIF images. An attacker could use this to cause
a denial of service (application crash). This issue only affected
Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9764)

Update instructions

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

Ubuntu 16.04 LTS:
libimlib2

1.4.7-1ubuntu0.1
Ubuntu 14.04 LTS:
libimlib2

1.4.6-2ubuntu0.1
Ubuntu 12.04 LTS:
libimlib2

1.4.4-1ubuntu0.1

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

After a standard system update you will need to restart applications
that make use of Imlib2 to make all the necessary changes.

References

CVE-2011-5326,

CVE-2014-9762,

CVE-2014-9763,

CVE-2014-9764,

CVE-2014-9771,

CVE-2016-3993,

CVE-2016-3994,

CVE-2016-4024

Source: USN-3075-1: Imlib2 vulnerabilities

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