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Vulnerability of GDM: privilege escalation

Synthesis of the vulnerability 

An attacker can bypass restrictions of GDM, in order to escalate his privileges.
Impacted software: Fedora, openSUSE Leap, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 20/02/2019.
Références of this announce: CVE-2019-3825, FEDORA-2019-caab5920f2, openSUSE-SU-2019:0310-1, SUSE-SU-2019:0527-1, USN-3892-1, VIGILANCE-VUL-28570.

Description of the vulnerability 

An attacker can bypass restrictions of GDM, in order to escalate his privileges.
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This computer weakness impacts software or systems such as Fedora, openSUSE Leap, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability note 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 cybersecurity threat.

Solutions for this threat 

Fedora 29: new gdm packages.
New packages are available:
  Fedora 29: gdm 3.30.3-1.fc29

openSUSE Leap 15.0: new gdm packages.
New packages are available:
  openSUSE Leap 15.0: gdm 3.26.2.1-lp150.11.9.1

SUSE LE 15: new gdm packages.
New packages are available:
  SUSE LE 15 RTM: gdm 3.26.2.1-13.19.2

Ubuntu: new gdm3 packages.
New packages are available:
  Ubuntu 18.10: gdm3 3.30.1-1ubuntu5.1
  Ubuntu 18.04 LTS: gdm3 3.28.3-0ubuntu18.04.4
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