CVE-2018-20839

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 4.3 MEDIUM

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://github.com/systemd/systemd/pull/12378	Third Party Advisory
https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f	Patch Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993	Issue Tracking Third Party Advisory
http://www.securityfocus.com/bid/108389	Third Party Advisory VDB Entry
https://security.netapp.com/advisory/ntap-20190530-0002/	Patch Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E	Mailing List Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:systemd_project:systemd:242:-:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:*

cpe:2.3:h:netapp:cn1610:-:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:a:netapp:snapprotect:-:::::::*
	cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:::::::*

Information

Published : 2019-05-16 21:29

Updated : 2022-02-19 22:10

NVD link : CVE-2018-20839

Mitre link : CVE-2018-20839

JSON object : View

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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Products Affected

systemd_project

systemd

netapp

cn1610
solidfire_\&_hci_management_node
cn1610_firmware
snapprotect

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