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CVE-2025-47780

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

HIGH
7.8
CVSS Score
Published: May 22, 2025 at 04:56 PM UTC
Updated: June 17, 2026 at 09:28 AM UTC
3 products affected across 2 vendorsAsteriskCertified AsteriskAsterisk

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Asterisk· Sangoma
95%
v < 18.26.220.0.0 ≤ v < 20.14.121.0.0 ≤ v < 21.9.122.0.0 ≤ v < 22.4.1
Affected range stops below 18.26.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 20.14.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 21.9.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.4.1, so it looks safe — our inference, not a vendor statement
Certified Asterisk· Sangoma
95%
v < 18.918.918.9 cert118.9 cert1-rc118.9 cert1018.9 cert1118.9 cert1218.9 cert1318.9 cert218.9 cert318.9 cert418.9 cert518.9 cert618.9 cert718.9 cert818.9 cert8-rc118.9 cert8-rc218.9 cert920.7 cert120.7 cert1-rc120.7 cert1-rc220.7 cert220.7 cert320.7 cert4
Affected range stops below 18.9, so it looks safe — our inference, not a vendor statement
Asterisk· Asterisk
60%
v < 18.26.2v < 18.9-cert14v < 20.14.1v < 20.7-cert5v < 21.9.1v < 22.4.1
Affected range stops below 18.26.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 18.9-cert14, so it looks safe — our inference, not a vendor statement
Affected range stops below 20.14.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 20.7-cert5, so it looks safe — our inference, not a vendor statement
Affected range stops below 21.9.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.4.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMExploitVendor Advisory
Source: [email protected]
https://github.com/asterisk/asterisk/security/advisories/GHSA-c7p6-7mvq-8jq2
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/06/msg00003.html

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78

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