CVE-2018-20839

Severity

50%

Complexity

99%

Confidentiality

48%

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.

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 3.0 Base Score 9.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N).

Overview

First reported 6 years ago

2019-05-17 04:29:00

Last updated 6 years ago

2019-05-30 08:29:00

Affected Software

freedesktop Systemd 242

242

References

108389

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993

Issue Tracking, Third Party Advisory

https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f

Patch, Third Party Advisory

https://github.com/systemd/systemd/pull/12378

Third Party Advisory

https://security.netapp.com/advisory/ntap-20190530-0002/

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