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CVE-2018-20839

MEDIUM

4.3

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.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack VectorPHYSICAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published5/17/2019

Last Modified5/5/2025

Sourcenvd

Honeypot Sightings0

Affected Products

netapp:cn1610netapp:cn1610_firmwarenetapp:snapprotectnetapp:solidfire_\&_hci_management_nodesystemd_project:systemd

References

http://www.securityfocus.com/bid/108389(cve@mitre.org)

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993(cve@mitre.org)

https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f(cve@mitre.org)

https://github.com/systemd/systemd/pull/12378(cve@mitre.org)

https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E(cve@mitre.org)

https://security.netapp.com/advisory/ntap-20190530-0002/(cve@mitre.org)

http://www.securityfocus.com/bid/108389(af854a3a-2127-422b-91ae-364da2661108)

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/systemd/systemd/pull/12378(af854a3a-2127-422b-91ae-364da2661108)

https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E(af854a3a-2127-422b-91ae-364da2661108)

https://security.netapp.com/advisory/ntap-20190530-0002/(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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