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Vulnerability of GraphicsMagick: NULL pointer dereference via TIFFIgnoreTags

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via TIFFIgnoreTags() of GraphicsMagick, in order to trigger a denial of service.
Impacted software: Debian, openSUSE Leap, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 17/10/2017.
Références of this announce: CVE-2017-14532, DLA-1785-1, DLA-2366-1, openSUSE-SU-2017:2735-1, USN-3681-1, VIGILANCE-VUL-24154.

Description of the vulnerability 

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

Our Vigil@nce team determined that the severity of this computer 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 weakness note.

Solutions for this threat 

Debian 8: new imagemagick packages (14/05/2019).
New packages are available:
  Debian 8: imagemagick 8:6.8.9.9-5+deb8u16

Debian 9: new imagemagick packages (08/09/2020).
New packages are available:
  Debian 9: imagemagick 8:6.9.7.4+dfsg-11+deb9u10

openSUSE Leap: new GraphicsMagick packages.
New packages are available:
  openSUSE Leap 42.2: GraphicsMagick 1.3.25-11.27.1
  openSUSE Leap 42.3: GraphicsMagick 1.3.25-27.1

Ubuntu: new imagemagick packages.
New packages are available:
  Ubuntu 18.04 LTS: imagemagick 8:6.9.7.4+dfsg-16ubuntu6.2
  Ubuntu 17.10: imagemagick 8:6.9.7.4+dfsg-16ubuntu2.2
  Ubuntu 16.04 LTS: imagemagick 8:6.8.9.9-7ubuntu5.11
  Ubuntu 14.04 LTS: imagemagick 8:6.7.7.10-6ubuntu3.11
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