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Alpine: fail2ban: security update to 0.11.2-r1

high Tenable Cloud Security Plugin ID 404284

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - fail2ban is a daemon to ban hosts that cause multiple authentication errors. In versions 0.9.7 and prior,
 0.10.0 through 0.10.6, and 0.11.0 through 0.11.2, there is a vulnerability that leads to possible remote
 code execution in the mailing action mail-whois. Command `mail` from mailutils package used in mail
 actions like `mail-whois` can execute command if unescaped sequences (`\n~`) are available in "foreign"
 input (for instance in whois output). To exploit the vulnerability, an attacker would need to insert
 malicious characters into the response sent by the whois server, either via a MITM attack or by taking
 over a whois server. The issue is patched in versions 0.10.7 and 0.11.3. As a workaround, one may avoid
 the usage of action `mail-whois` or patch the vulnerability manually. (CVE-2021-32749)

See Also

https://security.alpinelinux.org/vuln/CVE-2021-32749

Plugin Details

Severity: High

ID: 404284

Version: Revision 1.25

Type: Local

Published: 10/31/2023

Updated: 7/2/2026

Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.58

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2021-32749

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 7/16/2021

Reference Information

CVE: CVE-2021-32749