CVE-2017-12164
Published: 26 July 2018
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.
Notes
| Author | Note |
|---|---|
| leosilva | according with RHEL it's a side effect introduced in gdm-3.24.1 affecting only artful and zesty. |
| mdeslaur | introduced by ff98b2817014684ae1acec78ff06f0f461a56a9f |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
gdm3 Launchpad, Ubuntu, Debian |
artful |
Released
(3.26.0-1ubuntu1)
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
| zesty |
Released
(3.24.1-0ubuntu0.2)
|
|
|
Patches: upstream: https://git.gnome.org/browse/gdm/commit/?id=798be427d2cf9bd2cdcffb75cacc3ab7fd1b1234 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.4 |
| Attack vector | Physical |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |