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Amazon Linux 2 : util-linux (ALAS-2022-1878)

high Nessus Plugin ID 168443

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of util-linux installed on the remote host is prior to 2.30.2-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2022-1878 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

Run 'yum update util-linux' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2022-1878.html

https://alas.aws.amazon.com/cve/html/CVE-2018-7738.html

Plugin Details

Severity: High

ID: 168443

File Name: al2_ALAS-2022-1878.nasl

Version: 1.2

Type: local

Agent: unix

Published: 12/7/2022

Updated: 12/7/2022

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, 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: p-cpe:/a:amazon:linux:libmount-devel, p-cpe:/a:amazon:linux:libsmartcols-devel, p-cpe:/a:amazon:linux:libfdisk, p-cpe:/a:amazon:linux:libsmartcols, p-cpe:/a:amazon:linux:python-libmount, p-cpe:/a:amazon:linux:util-linux, p-cpe:/a:amazon:linux:libmount, p-cpe:/a:amazon:linux:util-linux-debuginfo, p-cpe:/a:amazon:linux:libblkid, p-cpe:/a:amazon:linux:libuuid-devel, p-cpe:/a:amazon:linux:libfdisk-devel, p-cpe:/a:amazon:linux:libuuid, p-cpe:/a:amazon:linux:uuidd, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:util-linux-user, p-cpe:/a:amazon:linux:libblkid-devel

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 11/15/2022

Vulnerability Publication Date: 3/7/2018

Reference Information

CVE: CVE-2018-7738