[USN-3843-2] pixman vulnerability

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Ubuntu Security Notice USN-3843-2
December 11, 2018

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

– Ubuntu 12.04 ESM

Summary:

pixman could be made to crash or run programs if it processed specially
crafted instructions.

Software Description:
– pixman: pixel-manipulation library for X and cairo

Details:

USN-3843-1 fixed a vulnerability in pixman. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

=C2=A0It was discovered that pixman incorrectly handled the
=C2=A0general_composite_rect function. A remote attacker could use this
=C2=A0issue to cause pixman to crash, resulting in a denial of service, or =
=C2=A0
possibly execute arbitrary code.

Update instructions:

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

Ubuntu 12.04 ESM:
=C2=A0 libpixman-1-0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A00.30.2-1ubuntu0=
.0.0.0.4

After a standard system update you need to restart your session to make
all the necessary changes.

References:
=C2=A0 https://usn.ubuntu.com/usn/usn-3843-2
=C2=A0 https://usn.ubuntu.com/usn/usn-3843-1
=C2=A0 CVE-2015-5297
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