CVE-2017-12164
Description
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.1 | 6.4 | 4.1 |
| Attack Vector | Physical | Physical | Physical |
| Attack Complexity | Low | High | Low |
| Privileges Required | None | None | None |
| User Interaction | Required | None | Required |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | Low | High | Low |
| Integrity Impact | Low | High | Low |
| Availability Impact | Low | High | Low |
Vector
Red Hat: CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
NVD: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.0/AV:P/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability,Access Control
Technical Impact: Read Application Data; Gain Privileges or Assume Identity; Execute Unauthorized Code or Commands
This weakness can lead to the exposure of resources or functionality to unintended actors, possibly providing attackers with sensitive information or even execute arbitrary code.
Acknowledgements
Red Hat would like to thank Tobias Guggenmos for reporting this issue.
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