Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kernel | Util-Linux | <= 2.31 |
References
- http://www.securityfocus.com/bid/103367Third Party AdvisoryVDB Entry
- https://bugs.debian.org/892179PatchThird Party Advisory
- https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883dPatchThird Party Advisory
- https://github.com/karelzak/util-linux/issues/539Issue TrackingThird Party Advisory
- https://usn.ubuntu.com/4512-1/
- https://www.debian.org/security/2018/dsa-4134Third Party Advisory
- http://www.securityfocus.com/bid/103367Third Party AdvisoryVDB Entry
- https://bugs.debian.org/892179PatchThird Party Advisory
- https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883dPatchThird Party Advisory
- https://github.com/karelzak/util-linux/issues/539Issue TrackingThird Party Advisory
- https://security.netapp.com/advisory/ntap-20241213-0002/
- https://usn.ubuntu.com/4512-1/
- https://www.debian.org/security/2018/dsa-4134Third Party Advisory
FAQ
What is CVE-2018-7738?
CVE-2018-7738 is a vulnerability with a CVSS score of 7.8 (HIGH). 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) ...
How severe is CVE-2018-7738?
CVE-2018-7738 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-7738?
Check the references section above for vendor advisories and patch information. Affected products include: Kernel Util-Linux.