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Vulnerability of GSI OpenSSH: privilege escalation via PermitPAMUserChange

Synthesis of the vulnerability 

An attacker can bypass restrictions via PermitPAMUserChange of GSI OpenSSH, in order to escalate his privileges.
Impacted systems: Fedora.
Severity of this alert: 3/4.
Creation date: 18/02/2019.
Références of this alert: CVE-2019-7639, FEDORA-2019-710afd062a, VIGILANCE-VUL-28523.

Description of the vulnerability 

An attacker can bypass restrictions via PermitPAMUserChange of GSI OpenSSH, in order to escalate his privileges.
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This weakness bulletin impacts software or systems such as Fedora.

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

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this vulnerability announce.

Solutions for this threat 

Fedora 28: new gsi-openssh packages.
New packages are available:
  Fedora 28: gsi-openssh 7.8p1-3.fc28
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Vigil@nce provides a network vulnerability database. The Vigil@nce team tracks computer vulnerabilities impacting systems and applications.