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Vulnerability of Debian: privilege escalation via postgresql-common pg_ctlcluster Directory Creation

Synthesis of the vulnerability 

An attacker can bypass restrictions via postgresql-common pg_ctlcluster Directory Creation of Debian, in order to escalate his privileges.
Impacted software: Debian, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 15/11/2019.
Références of this announce: CVE-2019-3466, DLA-1994-1, DSA-4568-1, USN-4194-1, USN-4194-2, VIGILANCE-VUL-30874.

Description of the vulnerability 

An attacker can bypass restrictions via postgresql-common pg_ctlcluster Directory Creation of Debian, in order to escalate his privileges.
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This security threat impacts software or systems such as Debian, Ubuntu.

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

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

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

Solutions for this threat 

Debian 9/10: new postgresql-common packages.
New packages are available:
  Debian 9: postgresql-common 181+deb9u3
  Debian 10: postgresql-common 200+deb10u3

Debian 8: new postgresql-common packages.
New packages are available:
  Debian 8: postgresql-common 165+deb8u4

Ubuntu: new postgresql-common packages.
New packages are available:
  Ubuntu 19.10: postgresql-common 204ubuntu0.1
  Ubuntu 19.04: postgresql-common 199ubuntu0.1
  Ubuntu 18.04 LTS: postgresql-common 190ubuntu0.1
  Ubuntu 16.04 LTS: postgresql-common 173ubuntu0.3
  Ubuntu 14.04 ESM: postgresql-common 154ubuntu1.1+esm1
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