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Vulnerability of Ghostscript: read-write access via Post Rsearch

Synthesis of the vulnerability 

An attacker can bypass access restrictions via Post Rsearch of Ghostscript, in order to read or alter data.
Impacted software: openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 31/07/2020.
Références of this announce: CVE-2020-15900, openSUSE-SU-2020:1142-1, openSUSE-SU-2020:1146-1, SUSE-SU-2020:2095-1, SUSE-SU-2020:2097-1, USN-4445-1, VIGILANCE-VUL-32980.

Description of the vulnerability 

An attacker can bypass access restrictions via Post Rsearch of Ghostscript, in order to read or alter data.
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This threat bulletin impacts software or systems such as openSUSE Leap, Solaris, SUSE Linux Enterprise Desktop, SLES, 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 

openSUSE Leap 15.1: new ghostscript packages.
New packages are available:
  openSUSE Leap 15.1: ghostscript 9.52-lp151.3.15.1

openSUSE Leap 15.2: new ghostscript packages.
New packages are available:
  openSUSE Leap 15.2: ghostscript 9.52-lp152.2.4.1

Oracle Solaris: patch for third party software of January 2021 v3.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE: new ghostscript packages.
New packages are available:
  SUSE LE 12 SP2: ghostscript 9.52-23.39.1
  SUSE LE 12 SP3: ghostscript 9.52-23.39.1
  SUSE LE 12 SP4: ghostscript 9.52-23.39.1
  SUSE LE 12 SP5: ghostscript 9.52-23.39.1
  SUSE LE 15 RTM: ghostscript 9.52-3.32.1
  SUSE LE 15 SP1: ghostscript 9.52-3.32.1
  SUSE LE 15 SP2: ghostscript 9.52-3.32.1

Ubuntu 20.04: new ghostscript packages.
New packages are available:
  Ubuntu 20.04 LTS: ghostscript 9.50~dfsg-5ubuntu4.1
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