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Vulnerability of libpng/pnm2png: denial of service via png_free_data

Synthesis of the vulnerability 

An attacker can generate a fatal error via png_free_data() of libpng/pnm2png, in order to trigger a denial of service.
Impacted systems: Fedora, libpng, Java OpenJDK, Java Oracle, Slackware.
Severity of this alert: 1/4.
Creation date: 16/07/2018.
Références of this alert: 238, cpuoct2018, CVE-2018-14048, FEDORA-2020-2f4a1bffba, FEDORA-2020-512f0121dc, SSA:2019-107-01, VIGILANCE-VUL-26753.

Description of the vulnerability 

An attacker can generate a fatal error via png_free_data() of libpng/pnm2png, in order to trigger a denial of service.
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This computer vulnerability bulletin impacts software or systems such as Fedora, libpng, Java OpenJDK, Java Oracle, Slackware.

Our Vigil@nce team determined that the severity of this vulnerability bulletin is low.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this threat note.

Solutions for this threat 

libpng: version 1.6.37.
The version 1.6.37 is fixed:
  https://sourceforge.net/projects/libpng/files/libpng16/1.6.37/

libpng/pnm2png: solution for png_free_data.
The solution VIGILANCE-SOL-63777 is available.

Fedora: new mingw-libpng packages.
New packages are available:
  Fedora 30: mingw-libpng 1.6.37-3.fc30
  Fedora 31: mingw-libpng 1.6.37-3.fc31

Oracle Java: version 11.0.1.
The version 11.0.1 is fixed:
  http://www.oracle.com/technetwork/indexes/downloads/index.html
  https://www.oracle.com/technetwork/java/javase/11u-relnotes-5093844.html

Oracle Java: version 6u211.
The version 6u211 is fixed:
  http://www.oracle.com/technetwork/indexes/downloads/index.html
  http://www.oracle.com/technetwork/java/javase/documentation/overview-156328.html

Oracle Java: version 7u201.
The version 7u201 is fixed:
  http://www.oracle.com/technetwork/indexes/downloads/index.html
  http://www.oracle.com/technetwork/java/javase/documentation/javase7supportreleasenotes-1601161.html

Oracle Java: version 8u191.
The version 8u191 is fixed:
  http://www.oracle.com/technetwork/indexes/downloads/index.html
  http://www.oracle.com/technetwork/java/javase/documentation/8u-relnotes-2225394.html

Slackware: new libpng packages.
New packages are available:
  Slackware 14.2: libpng 1.6.37-*-1_slack14.2
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