CVE-2018-20839
OpenSSH systemd VT1 Cleartext Password Disclosure
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.
INFO
Published Date :
May 17, 2019, 4:29 a.m.
Last Modified :
Oct. 24, 2024, 5:34 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
0.7
Public PoC/Exploit Available at Github
CVE-2018-20839 has a 4 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
Affected Products
The following products are affected by CVE-2018-20839
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-20839
.
URL | Resource |
---|---|
http://www.securityfocus.com/bid/108389 | Broken Link Third Party Advisory VDB Entry |
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993 | Issue Tracking Third Party Advisory |
https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f | Patch |
https://github.com/systemd/systemd/pull/12378 | Issue Tracking Patch |
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E | Mailing List |
https://security.netapp.com/advisory/ntap-20190530-0002/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Shell
A command line tool which provides an alternative interface to snyk test
snyk
Makefile Dockerfile Crystal Open Policy Agent
None
Shell
Making CoreOS' Clair easily work in CI/CD pipelines
security-tools security-audit dev-ops ci-cd clair static-analysis docker vulnerabilities
Shell Python Dockerfile Ruby
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-20839
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-20839
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Oct. 24, 2024
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Changed Reference Type http://www.securityfocus.com/bid/108389 Third Party Advisory, VDB Entry http://www.securityfocus.com/bid/108389 Broken Link, Third Party Advisory, VDB Entry Changed Reference Type https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f Patch, Third Party Advisory https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f Patch Changed Reference Type https://github.com/systemd/systemd/pull/12378 Third Party Advisory https://github.com/systemd/systemd/pull/12378 Issue Tracking, Patch Changed Reference Type https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E Mailing List Changed Reference Type https://security.netapp.com/advisory/ntap-20190530-0002/ Patch, Third Party Advisory https://security.netapp.com/advisory/ntap-20190530-0002/ Third Party Advisory Removed CWE NIST CWE-200 Added CWE NIST NVD-CWE-noinfo -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E [No types assigned] Removed Reference MITRE https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E -
Modified Analysis by [email protected]
Feb. 20, 2022
Action Type Old Value New Value Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.securityfocus.com/bid/108389 No Types Assigned http://www.securityfocus.com/bid/108389 Third Party Advisory, VDB Entry Changed Reference Type https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E No Types Assigned https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20190530-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20190530-0002/ Patch, Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:netapp:cn1610_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:netapp:cn1610:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:snapprotect:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* -
CPE Deprecation Remap by [email protected]
Jan. 28, 2022
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:freedesktop:systemd:242:-:*:*:*:*:*:* OR *cpe:2.3:a:systemd_project:systemd:242:-:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 25, 2021
Action Type Old Value New Value Added Reference https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E [No Types Assigned] -
CWE Remap by [email protected]
Aug. 24, 2020
Action Type Old Value New Value Changed CWE CWE-255 CWE-200 -
CVE Modified by [email protected]
May. 30, 2019
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20190530-0002/ [No Types Assigned] -
CVE Modified by [email protected]
May. 21, 2019
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/108389 [No Types Assigned] -
Initial Analysis by [email protected]
May. 20, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f No Types Assigned https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f Patch, Third Party Advisory Changed Reference Type https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993 No Types Assigned https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993 Issue Tracking, Third Party Advisory Changed Reference Type https://github.com/systemd/systemd/pull/12378 No Types Assigned https://github.com/systemd/systemd/pull/12378 Third Party Advisory Added CWE CWE-255 Added CPE Configuration OR *cpe:2.3:a:freedesktop:systemd:242:-:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-20839
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-20839
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} -1.50%
score
0.47358
percentile