Information Exposure The advisory has been revoked - it doesn't affect any version of package systemd (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-SYSTEMD-346739
- published17 May 2019
- disclosed17 May 2019
Introduced: 17 May 2019
CVE-2018-20839 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-20839
- https://security-tracker.debian.org/tracker/CVE-2018-20839
- https://github.com/systemd/systemd/commit/9725f1a10f80f5e0ae7d9b60547458622aeb322f
- https://github.com/systemd/systemd/pull/12378
- https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1803993
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
- https://security.netapp.com/advisory/ntap-20190530-0002/
- http://www.securityfocus.com/bid/108389
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E