Vulnerability CVE-2017-12164
Published: 2018-07-26

Description:
A flaw was discovered in gdm 3.24.1 where gdm greeter was no longer setting the ran_once boolean during autologin. If autologin was enabled for a victim, an attacker could simply select 'login as another user' to unlock their screen.

Type:

CWE-665

 (Improper Initialization)

CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.9/10
10/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Gnome -> Gnome display manager 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12164
https://gitlab.gnome.org/GNOME/gdm/commit/ff98b28
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