Improper Input Validation Affecting coreutils package, versions <9.1-1-e1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-ECHOLATEST-COREUTILS-18306865
- published25 Jul 2026
- disclosed7 Feb 2017
Introduced: 7 Feb 2017
CVE-2016-2781 (opens in a new tab)How to fix?
Upgrade Echo:latest coreutils to version 9.1-1-e1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream coreutils package and not the coreutils package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
chroot in GNU coreutils, when used with --userspec, allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.
References
- https://advisory.echohq.com/cve/CVE-2016-2781
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
- http://www.openwall.com/lists/oss-security/2016/02/28/2
- http://www.openwall.com/lists/oss-security/2016/02/28/3
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E