CVE-2018-20839

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Source
https://cve.org/CVERecord?id=CVE-2018-20839
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20839.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-20839
Downstream
Published
2019-05-17T04:29:00Z
Modified
2026-10-24T10:47:25Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/systemd/systemd

Affected ranges

Type
GIT
Repo
https://github.com/systemd/systemd
Events
Introduced
1e5d2d656420d0e755dbcf72aeba3c3aba54e956
Last Affected
1e5d2d656420d0e755dbcf72aeba3c3aba54e956
Fixed
9725f1a10f80f5e0ae7d9b60547458622aeb322f
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:systemd_project:systemd:242:-:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "242-NA"
                },
                {
                    "last_affected":  "242-NA"
                }
            ],
            "source":  "CPE_STRING"
        },
        {
            "range":  [
                {
                    "fixed":  "9725f1a10f80f5e0ae7d9b60547458622aeb322f"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

Other
242-NA
v242

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20839.json"

Git / github.com/systemd/systemd-stable

Affected ranges

Type
GIT
Repo
https://github.com/systemd/systemd-stable
Events
Introduced
1e5d2d656420d0e755dbcf72aeba3c3aba54e956
Last Affected
1e5d2d656420d0e755dbcf72aeba3c3aba54e956
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:systemd_project:systemd:242:-:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "242-NA"
                },
                {
                    "last_affected":  "242-NA"
                }
            ],
            "source":  "CPE_STRING"
        }
    ]
}

Affected versions

Other
242-NA
v242

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20839.json"