CVE-2025-47780

cli_permissions.conf: deny option does not work for disallowing shell commands

State: Published
Severity: 4.8 Medium
Published: May 22, 2025
Updated: Nov 3, 2025
Reserved: May 9, 2025

Description

Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, trying to disallow shell commands to be run via the Asterisk command line interface (CLI) by configuring `cli_permissions.conf` (e.g. with the config line `deny=!*`) does not work which could lead to a security risk. If an administrator running an Asterisk instance relies on the `cli_permissions.conf` file to work and expects it to deny all attempts to execute shell commands, then this could lead to a security vulnerability. Versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk fix the issue.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Affected Products

Product	Versions
asteriskasterisk	< 18.9-cert14Affected >= 18.10, < 18.26.2Affected >= 20.0, < 20.7-cert5Affected >= 20.8, < 20.14.1Affected >= 21.0, < 21.9.1Affected >= 22.0, < 22.4.1Affected

References

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