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AlmaLinux 8 : sudo (ALSA-2021:0218)

high Nessus Plugin ID 157707

Synopsis

The remote AlmaLinux host is missing a security update.

Description

The remote AlmaLinux 8 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2021:0218 advisory.

 - Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via sudoedit -s and a command-line argument that ends with a single backslash character. (CVE-2021-3156)

 - A heap-based buffer overflow was found in the way sudo parses command line arguments. This flaw is exploitable by any local user who can execute the sudo command without authentication. Successful exploitation of this flaw could lead to privilege escalation. (CVE-2021-3156)

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 sudo package.

See Also

https://errata.almalinux.org/8/ALSA-2021-0218.html

Plugin Details

Severity: High

ID: 157707

File Name: alma_linux_ALSA-2021-0218.nasl

Version: 1.8

Type: local

Published: 2/9/2022

Updated: 1/16/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS Score Source: CVE-2021-3156

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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:H/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:alma:linux:sudo, cpe:/o:alma:linux:8

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/26/2021

Vulnerability Publication Date: 1/25/2021

CISA Known Exploited Vulnerability Due Dates: 4/27/2022

Exploitable With

CANVAS (CANVAS)

Core Impact

Metasploit (Sudo Heap-Based Buffer Overflow)

Reference Information

CVE: CVE-2021-3156

IAVA: 2021-A-0053