CVE-2018-7738

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.

7.8

CVSS

Severity: High

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.05%

Vendor Advisory debian.org Vendor Advisory ubuntu.com

Affected: n/a n/a

References

Link	Tags
https://github.com/karelzak/util-linux/issues/539	issue tracking third party advisory
https://www.debian.org/security/2018/dsa-4134	third party advisory vendor advisory
http://www.securityfocus.com/bid/103367	vdb entry third party advisory
https://bugs.debian.org/892179	third party advisory patch
https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55	third party advisory patch
https://usn.ubuntu.com/4512-1/	vendor advisory
https://security.netapp.com/advisory/ntap-20241213-0002/

Frequently Asked Questions

What is the severity of CVE-2018-7738?: CVE-2018-7738 has been scored as a high severity vulnerability.
How to fix CVE-2018-7738?: To fix CVE-2018-7738, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-7738 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-7738 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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