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Ubuntu 18.04 LTS : util-linux vulnerability (USN-4512-1)

critical Nessus Plugin ID 140648

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4512-1 advisory.

 It was discovered that the umount bash completion script shipped in util-linux incorrectly handled certain mountpoints. If a local attacker were able to create arbitrary mountpoints, another user could be tricked into executing arbitrary code when attempting to run the umount command with bash completion.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-4512-1

Plugin Details

Severity: Critical

ID: 140648

File Name: ubuntu_USN-4512-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 9/17/2020

Updated: 9/19/2024

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2018-7738

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libuuid1-udeb, p-cpe:/a:canonical:ubuntu_linux:libblkid1-udeb, p-cpe:/a:canonical:ubuntu_linux:fdisk, p-cpe:/a:canonical:ubuntu_linux:libblkid1, p-cpe:/a:canonical:ubuntu_linux:libmount1, p-cpe:/a:canonical:ubuntu_linux:fdisk-udeb, p-cpe:/a:canonical:ubuntu_linux:bsdutils, p-cpe:/a:canonical:ubuntu_linux:libfdisk1-udeb, p-cpe:/a:canonical:ubuntu_linux:rfkill, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libsmartcols1-udeb, p-cpe:/a:canonical:ubuntu_linux:util-linux-locales, p-cpe:/a:canonical:ubuntu_linux:uuid-runtime, p-cpe:/a:canonical:ubuntu_linux:libfdisk1, p-cpe:/a:canonical:ubuntu_linux:util-linux, p-cpe:/a:canonical:ubuntu_linux:libmount1-udeb, p-cpe:/a:canonical:ubuntu_linux:libmount-dev, p-cpe:/a:canonical:ubuntu_linux:libsmartcols-dev, p-cpe:/a:canonical:ubuntu_linux:setpriv, p-cpe:/a:canonical:ubuntu_linux:libuuid1, p-cpe:/a:canonical:ubuntu_linux:libblkid-dev, p-cpe:/a:canonical:ubuntu_linux:uuid-dev, p-cpe:/a:canonical:ubuntu_linux:libsmartcols1, p-cpe:/a:canonical:ubuntu_linux:libfdisk-dev, p-cpe:/a:canonical:ubuntu_linux:util-linux-udeb, p-cpe:/a:canonical:ubuntu_linux:mount

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 9/17/2020

Vulnerability Publication Date: 3/7/2018

Reference Information

CVE: CVE-2018-7738

BID: 103367

USN: 4512-1