[USN-3712-1] libpng vulnerabilities


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Ubuntu Security Notice USN-3712-1
July 11, 2018

libpng, libpng1.6 vulnerabilities
=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 18.04 LTS
– Ubuntu 17.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in libpng.

Software Description:
– libpng1.6: PNG library – development (version 1.6)
– libpng: PNG (Portable Network Graphics) file library

Details:

Patrick Keshishian discovered that libpng incorrectly handled certain
PNG files. An attacker could possibly use this to cause a denial of
service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04
LTS. (CVE-2016-10087)

Thuan Pham discovered that libpng incorrectly handled certain PNG
files. An attacker could possibly use this to cause a denial of
service. This issue only affected Ubuntu 17.10 and Ubuntu 18.04 LTS.
(CVE-2018-13785)

Update instructions:

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

Ubuntu 18.04 LTS:
=C2=A0 libpng16-16=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=A01.6.34=
-1ubuntu0.18.04.1

Ubuntu 17.10:
=C2=A0 libpng16-16=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=A01.6.34=
-1ubuntu0.17.10.1

Ubuntu 16.04 LTS:
=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=
1.2.54-1ubuntu1.1

Ubuntu 14.04 LTS:
=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=
1.2.50-1ubuntu2.14.04.3

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

References:
=C2=A0 https://usn.ubuntu.com/usn/usn-3712-1
=C2=A0 CVE-2016-10087, CVE-2018-13785

Package Information:
=C2=A0 https://launchpad.net/ubuntu/+source/libpng1.6/1.6.34-1ubuntu0.18.04=
.
1
=C2=A0 https://launchpad.net/ubuntu/+source/libpng1.6/1.6.34-1ubuntu0.17.10=
.
1
=C2=A0 https://launchpad.net/ubuntu/+source/libpng/1.2.54-1ubuntu1.1
=C2=A0 https://launchpad.net/ubuntu/+source/libpng/1.2.50-1ubuntu2.14.04.3
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