Current 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.
Source:
MITRE
Description Last Modified:
07/26/2018
View Analysis Description
Analysis 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.
Source:
MITRE
Description Last Modified:
07/26/2018
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
6.4 MEDIUM
Vector:
AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
(V3 legend)
Impact Score:
5.9
Exploitability Score:
0.5
Attack Vector (AV):
Physical
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High
CVSS v2.0 Severity and Metrics:
Base Score:
6.9 MEDIUM
Vector:
(AV:L/AC:M/Au:N/C:C/I:C/A:C)
(V2 legend)
Impact Subscore:
10.0
Exploitability Subscore:
3.4
Access Vector (AV):
Local
Access Complexity (AC):
Medium
Authentication (AU):
None
Confidentiality (C):
Complete
Integrity (I):
Complete
Availability (A):
Complete
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service
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Change History
1 change record found
- show changes
Initial Analysis -
9/21/2018 1:51:10 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:gnome:gnome_display_manager:3.24.1:*:*:*:*:*:*:* |
| Added |
CVSS V2 |
|
(AV:L/AC:M/Au:N/C:C/I:C/A:C) |
| Added |
CVSS V3 |
|
AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Added |
CWE |
|
CWE-254 |
| Changed |
Reference Type |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12164 No Types Assigned |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-12164 Issue Tracking, Patch, Third Party Advisory |
| Changed |
Reference Type |
https://gitlab.gnome.org/GNOME/gdm/commit/ff98b28 No Types Assigned |
https://gitlab.gnome.org/GNOME/gdm/commit/ff98b28 Patch, Vendor Advisory |