A flaw was discovered in the gdm where gdm greeter was no longer setting the ran_once boolean during autologin. If autologin was enable for a victim, an attacker could simply select 'login as another user' to unlock their screen.
Find out more about CVE-2017-12164 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 4.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L |
| Attack Vector | Physical |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | Low |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 7 | gdm | Not affected |
| Red Hat Enterprise Linux 6 | gdm | Not affected |
| Red Hat Enterprise Linux 5 | gdm | Not affected |
Vulmon