CVE-2018-7738 Affecting util-linux package, versions <2.31.1-0.5
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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- published7 Mar 2018
- disclosed7 Mar 2018
Introduced: 7 Mar 2018
CVE-2018-7738 (opens in a new tab)How to fix?
Upgrade Debian:unstable util-linux to version 2.31.1-0.5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream util-linux package and not the util-linux package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.
References
- https://security-tracker.debian.org/tracker/CVE-2018-7738
- https://bugs.debian.org/892179
- https://www.debian.org/security/2018/dsa-4134
- https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55
- https://github.com/karelzak/util-linux/issues/539
- http://www.securityfocus.com/bid/103367
- https://usn.ubuntu.com/4512-1/
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-7738
- https://security.netapp.com/advisory/ntap-20241213-0002/