CVE-2018-20839

CVSS V2 Medium 4.3 CVSS V3 Critical 9.8
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.
Overview
  • CVE ID
  • CVE-2018-20839
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-05-17T04:29:00
  • Last Modified Date
  • 2022-02-20T06:10:25
Weakness Enumerations
CWE URL
CWE-200 http://cwe.mitre.org/data/definitions/200.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:systemd_project:systemd:242:-:*:*:*:*:*:* 1 OR
AND
cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:cn1610:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:N/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 9.8
  • Base Severity
  • CRITICAL
  • Exploitability Score
  • 3.9
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
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
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-20839
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20839
History
Created Old Value New Value Data Type Notes
2022-05-10 06:32:07 Added to TrackCVE
2022-12-03 20:51:50 2019-05-17T04:29Z 2019-05-17T04:29:00 CVE Published Date updated
2022-12-03 20:51:50 2022-02-20T06:10:25 CVE Modified Date updated
2022-12-03 20:51:50 Analyzed Vulnerability Status updated