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 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 v3.0 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3.0 : HIGH

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/karelzak/util-linux/issues/539	Issue Tracking Third Party Advisory
https://github.com/karelzak/util-linux/commit/75f03badd7ed9f1dd951863d75e756883d3acc55	Patch Third Party Advisory
https://bugs.debian.org/892179	Patch Third Party Advisory
https://www.debian.org/security/2018/dsa-4134	Third Party Advisory
http://www.securityfocus.com/bid/103367	Third Party Advisory VDB Entry
https://usn.ubuntu.com/4512-1/

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Configurations

Configuration 1 (hide)

cpe:2.3:a:kernel:util-linux:*:*:*:*:*:*:*:*

Information

Published : 2018-03-06 18:29

Updated : 2020-09-25 11:15

NVD link : CVE-2018-7738

Mitre link : CVE-2018-7738

JSON object : View

CWE

NVD-CWE-noinfo

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Products Affected

kernel

util-linux

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