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Vulnerability of GraphicsMagick: NULL pointer dereference via CINEON

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via CINEON of GraphicsMagick, in order to trigger a denial of service.
Impacted software: Debian, openSUSE Leap, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 19/03/2018.
Références of this announce: CVE-2017-18230, DLA-1322-1, DLA-1456-1, DSA-4321-1, DSA-4321-2, openSUSE-SU-2018:0733-1, USN-4266-1, VIGILANCE-VUL-25588.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via CINEON of GraphicsMagick, in order to trigger a denial of service.
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This threat bulletin impacts software or systems such as Debian, openSUSE Leap, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat bulletin is medium.

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

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

Solutions for this threat 

Debian 7: new graphicsmagick packages.
New packages are available:
  Debian 7: graphicsmagick 1.3.16-1.1+deb7u19

Debian 8: new graphicsmagick packages (03/08/2018).
New packages are available:
  Debian 8: graphicsmagick 1.3.20-3+deb8u4

Debian 9: new graphicsmagick packages.
New packages are available:
  Debian 9: graphicsmagick 1.3.30+hg15796-1~deb9u2

openSUSE Leap 42.3: new GraphicsMagick packages.
New packages are available:
  openSUSE Leap 42.3: GraphicsMagick 1.3.25-79.1

Ubuntu 16.04: new graphicsmagick packages.
New packages are available:
  Ubuntu 16.04 LTS: graphicsmagick 1.3.23-1ubuntu0.6
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