[USN-3712-2] libpng vulnerability


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Ubuntu Security Notice USN-3712-2
July 11, 2018

libpng vulnerability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 12.04 ESM

Summary:

libpng could be made to crash if it received a specially crafted file.

Software Description:
– libpng: PNG (Portable Network Graphics) file library

Details:

USN-3712-1 fixed a vulnerability in libpng. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

=C2=A0Patrick Keshishian discovered that libpng incorrectly handled certain
=C2=A0PNG files. An attacker could possibly use this to cause a denial of
=C2=A0service.

Update instructions:

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

Ubuntu 12.04 ESM:
=C2=A0 libpng12-0=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=A0=C2=A0=C2=A0=C2=A0=
1.2.46-3ubuntu4.3

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

References:
=C2=A0 https://usn.ubuntu.com/usn/usn-3712-2
=C2=A0 https://usn.ubuntu.com/usn/usn-3712-1
=C2=A0 CVE-2016-10087
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