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

high 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.

 - 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. (CVE-2018-7738)

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: High

ID: 140648

File Name: ubuntu_USN-4512-1.nasl

Version: 1.4

Type: local

Agent: unix

Published: 9/17/2020

Updated: 10/21/2023

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

Vulnerability Information

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

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