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Vulnerability of sssd: privilege escalation via Unreadable GPO

Synthesis of the vulnerability 

An attacker can bypass restrictions via Unreadable GPO of sssd, in order to escalate his privileges.
Impacted products: openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.
Severity of this bulletin: 2/4.
Creation date: 13/06/2019.
Références of this threat: CVE-2018-16838, openSUSE-SU-2019:1576-1, openSUSE-SU-2019:1589-1, RHSA-2019:2177-01, RHSA-2019:3651-01, SUSE-SU-2019:1476-1, SUSE-SU-2019:1477-1, SUSE-SU-2019:1480-1, VIGILANCE-VUL-29523.

Description of the vulnerability 

An attacker can bypass restrictions via Unreadable GPO of sssd, in order to escalate his privileges.
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This security vulnerability impacts software or systems such as openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.

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

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

An attacker with a expert ability can exploit this security note.

Solutions for this threat 

openSUSE Leap: new sssd packages.
New packages are available:
  openSUSE Leap 42.3: sssd 1.13.4-21.1
  openSUSE Leap 15.0: sssd 1.16.1-lp150.2.16.1
  openSUSE Leap 15.1: sssd 1.16.1-lp151.7.3.1

RHEL 7: new sssd packages.
New packages are available:
  RHEL 7: sssd 1.16.4-21.el7

RHEL 8: new sssd packages.
New packages are available:
  RHEL 8: sssd 2.2.0-19.el8

SUSE LE: new sssd packages.
New packages are available:
  SUSE LE 12 SP3: sssd 1.13.4-34.37.1
  SUSE LE 12 SP4: sssd 1.16.1-4.12.2
  SUSE LE 15 RTM: sssd 1.16.1-3.24.6
  SUSE LE 15 SP1: sssd 1.16.1-3.24.6
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