Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Published

2019-05-17T04:29:00.933

Last Modified

2025-05-05T14:14:36.570

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 4.3 (MEDIUM)

CVSSv2 Vector

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

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	systemd_project	systemd	242	Yes
Operating System	netapp	cn1610_firmware	-	Yes
Hardware	netapp	cn1610	-	No
Application	netapp	snapprotect	-	Yes
Application	netapp	solidfire_\&_hci_management_node	-	Yes

References

http://www.securityfocus.com/bid/108389 Broken Link, Third Party Advisory, VDB Entry ([email protected])
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993 Issue Tracking, Third Party Advisory ([email protected])
https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f Patch ([email protected])
https://github.com/systemd/systemd/pull/12378 Issue Tracking, Patch ([email protected])
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List ([email protected])
https://security.netapp.com/advisory/ntap-20190530-0002/ Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/108389 Broken Link, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f Patch (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/systemd/systemd/pull/12378 Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20190530-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)