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High severity · published Mar 7, 2018
CVE-2018-7738
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…
7.8
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UT
Util-linux · Kernel
through 2.31 · source: NVD
Affected product
UT
Util-linux
Kernel
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-7738
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-7738
Third Party Advisory
http://www.securityfocus.com/bid/103367
Patch
https://bugs.debian.org/892179
Patch
https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55
Issue Tracking
https://github.com/karelzak/util-linux/issues/539
usn.ubuntu.com
https://usn.ubuntu.com/4512-1/
Third Party Advisory
https://www.debian.org/security/2018/dsa-4134
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