CVE-2018-20839

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

17/05/2019

Last modified:

05/05/2025

Description

systemd 242 changes the VT1 mode upon a logout, which allows attackers to read cleartext passwords in certain circumstances, such as watching a shutdown, or using Ctrl-Alt-F1 and Ctrl-Alt-F2. This occurs because the KDGKBMODE (aka current keyboard mode) check is mishandled.

Impact

Vector 3.x

CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector (AV): Physical
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x

4.30

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:M/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

4.30

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:systemd_project:systemd:242:-::::::
cpe:2.3:o:netapp:cn1610_firmware:-:::::::*
cpe:2.3:h:netapp:cn1610:-:::::::*
cpe:2.3:a:netapp:snapprotect:-:::::::*
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:::::::*

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:systemd_project:systemd:242:-::::::
cpe:2.3:o:netapp:cn1610_firmware:-:::::::*
cpe:2.3:h:netapp:cn1610:-:::::::*
cpe:2.3:a:netapp:snapprotect:-:::::::*
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:::::::*

CVE-2018-20839

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools