CVE-2018-20839: Infoleak
First published: Fri May 17 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Systemd Project Systemd | =242 | |
| Netapp Cn1610 Firmware | ||
| Netapp Cn1610 | ||
| Netapp Snapprotect | ||
| Netapp Solidfire \& Hci Management Node | ||
| All of | ||
| Netapp Cn1610 Firmware | ||
| Netapp Cn1610 |
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Reference Links
- http://www.securityfocus.com/bid/108389
- https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993
- https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f
- https://github.com/systemd/systemd/pull/12378
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
- https://security.netapp.com/advisory/ntap-20190530-0002/
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2018-20839.
What is the severity of CVE-2018-20839?
The severity of CVE-2018-20839 is critical with a score of 9.8.
How does CVE-2018-20839 work?
CVE-2018-20839 allows attackers to read cleartext passwords by changing the VT1 mode upon a logout and mishandling the KDGKBMODE check.
Are there any known affected software versions?
Yes, the affected software version is systemd 242.
Is there a fix available for CVE-2018-20839?
Yes, a fix is available for CVE-2018-20839. Please refer to the provided references for more information.
- agent/type
- agent/remedy
- agent/weakness
- agent/severity
- agent/author
- agent/description
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/tags
- agent/first-publish-date
- agent/event
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/systemd project
- canonical/systemd project systemd
- version/systemd project systemd/242
- vendor/netapp
- canonical/netapp cn1610 firmware
- canonical/netapp cn1610
- canonical/netapp snapprotect
- canonical/netapp solidfire \& hci management node