UBUNTU-CVE-2018-7738

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Source
https://ubuntu.com/security/CVE-2018-7738
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-7738.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2018-7738
Upstream
Downstream
Related
Published
2018-03-07T02:29:00Z
Modified
2025-09-08T16:44:48Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - negligible
Summary
[none]
Details

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

Affected packages

Ubuntu:18.04:LTS / util-linux

Package

Name
util-linux
Purl
pkg:deb/ubuntu/util-linux@2.31.1-0.4ubuntu3.7?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.31.1-0.4ubuntu3.7

Affected versions

2.*

2.30.1-0ubuntu4
2.30.2-0.1ubuntu1
2.30.2-0.1ubuntu2
2.30.2-0.1ubuntu3
2.31.1-0.4ubuntu2
2.31.1-0.4ubuntu3
2.31.1-0.4ubuntu3.1
2.31.1-0.4ubuntu3.2
2.31.1-0.4ubuntu3.3
2.31.1-0.4ubuntu3.4
2.31.1-0.4ubuntu3.5
2.31.1-0.4ubuntu3.6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:2.31.1-0.4ubuntu3.7",
            "binary_name": "bsdutils"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "fdisk"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libblkid-dev"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libblkid1"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libfdisk-dev"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libfdisk1"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libmount-dev"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libmount1"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libsmartcols-dev"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libsmartcols1"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "libuuid1"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "mount"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "rfkill"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "setpriv"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "util-linux"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "util-linux-locales"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "uuid-dev"
        },
        {
            "binary_version": "2.31.1-0.4ubuntu3.7",
            "binary_name": "uuid-runtime"
        }
    ],
    "availability": "No subscription required"
}