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Vulnerability of GraphicsMagick: out-of-bounds memory reading via EncodeImage

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via EncodeImage() of GraphicsMagick, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable products: Debian, openSUSE Leap, SLES.
Severity of this weakness: 2/4.
Creation date: 15/01/2020.
Références of this bulletin: CVE-2019-19953, DLA-2084-1, DSA-4640-1, openSUSE-SU-2020:0055-1, openSUSE-SU-2020:0145-1, VIGILANCE-VUL-31338.

Description of the vulnerability 

An attacker can force a read at an invalid address via EncodeImage() of GraphicsMagick, in order to trigger a denial of service, or to obtain sensitive information.
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This threat announce impacts software or systems such as Debian, openSUSE Leap, SLES.

Our Vigil@nce team determined that the severity of this cybersecurity alert 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 security alert.

Solutions for this threat 

Debian 8: new graphicsmagick packages.
New packages are available:
  Debian 8: graphicsmagick 1.3.20-3+deb8u8

Debian 9/10: new graphicsmagick packages.
New packages are available:
  Debian 9: graphicsmagick 1.3.30+hg15796-1~deb9u3
  Debian 10: graphicsmagick 1.4~hg15978-1+deb10u1

openSUSE Leap 15.1: new GraphicsMagick packages.
New packages are available:
  openSUSE Leap 15.1: GraphicsMagick 1.3.29-lp151.4.14.1

SUSE LE 15 SP1: new GraphicsMagick packages.
New packages are available:
  SUSE LE 15 SP1: GraphicsMagick 1.3.29-bp151.5.9.1
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