CVE-2018-7738
First published: Tue Mar 06 2018(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Kernel Util-linux | <=2.31 | |
| debian/bash-completion | <=1:2.11-2<=1:2.11-6<=1:2.14.0-2 | |
| debian/util-linux | 2.36.1-8+deb11u2 2.38.1-5+deb12u2 2.38.1-5+deb12u1 2.40.2-12 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55#diff-a47601b5dbce9dc06c3af1deb02758c7
- https://security-tracker.debian.org/tracker/CVE-2018-7738
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=892179
- http://www.securityfocus.com/bid/103367
- https://bugs.debian.org/892179
- https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55
- https://github.com/karelzak/util-linux/issues/539
- https://usn.ubuntu.com/4512-1/
- https://www.debian.org/security/2018/dsa-4134
- https://launchpad.net/bugs/cve/CVE-2018-7738
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7738
- https://nvd.nist.gov/vuln/detail/CVE-2018-7738
- https://ubuntu.com/security/CVE-2018-7738
- https://security.netapp.com/advisory/ntap-20241213-0002/
Frequently Asked Questions
What is CVE-2018-7738?
CVE-2018-7738 is a vulnerability in util-linux before 2.32-rc1 that allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command.
How can an attacker exploit CVE-2018-7738?
An attacker can exploit CVE-2018-7738 by creating a malicious mountpoint name with embedded shell commands, and then triggering a umount command as a different user.
What is the severity of CVE-2018-7738?
CVE-2018-7738 has a severity rating of 7.8 (high).
Which versions of util-linux are affected by CVE-2018-7738?
Versions before 2.32-rc1 of util-linux are affected by CVE-2018-7738.
Is there a fix available for CVE-2018-7738?
Yes, the fix for CVE-2018-7738 is included in version 2.32-rc1 of util-linux.
- collector/debian-bugs
- alias/CVE-2018-7738
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/remedy
- agent/author
- agent/severity
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- agent/description
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- collector/nvd-cve
- source/NVD
- agent/softwarecombine
- collector/nvd-api
- vendor/kernel
- canonical/kernel util-linux
- version/kernel util-linux/2.31
- package-manager/debian