cli_permissions.conf: deny option does not work for disallowing shell commands
Priority MEDIUM 55CWE-78Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00276 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed asterisk (asterisk): 18.9-cert14, 18.26.2, 20.7-cert5 +3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| asterisk | asterisk | before 18.9-cert14; 18.10 to before 18.26.2; 20.0 to before 20.7-cert5; 20.8 to before 20.14.1; 21.0 to before 21.9.1; 22.0 to before 22.4.1 | 18.9-cert14, 18.26.2, 20.7-cert5, 20.14.1, 21.9.1, 22.4.1 | Patch available | CNA |
- asterisk Vendorasterisk Affected before 18.9-cert14; 18.10 to before 18.26.2; 20.0 to before 20.7-cert5; 20.8 to before 20.14.1; 21.0 to before 21.9.1; 22.0 to before 22.4.1 Fixed in 18.9-cert14, 18.26.2, 20.7-cert5, 20.14.1, 21.9.1, 22.4.1 Patch available CNA
CPE configurations NVD · 25
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* | before 18.26.2; 20.0.0 to before 20.14.1; 21.0.0 to before 21.9.1; 22.0.0 to before 22.4.1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* | before 18.9 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:* | 18.9 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:* | 18.9 cert1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:* | 18.9 cert1-rc1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:* | 18.9 cert10 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:* | 18.9 cert11 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert12:*:*:*:*:*:* | 18.9 cert12 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert13:*:*:*:*:*:* | 18.9 cert13 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:* | 18.9 cert2 | Vulnerable | Sangoma |
- cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* Versions before 18.26.2; 20.0.0 to before 20.14.1; 21.0.0 to before 21.9.1; 22.0.0 to before 22.4.1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* Versions before 18.9 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:* Versions 18.9 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:* Versions 18.9 cert1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:* Versions 18.9 cert1-rc1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:* Versions 18.9 cert10 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:* Versions 18.9 cert11 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert12:*:*:*:*:*:* Versions 18.9 cert12 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert13:*:*:*:*:*:* Versions 18.9 cert13 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:* Versions 18.9 cert2 Vulnerable ·Sangoma
Show 15 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:* | 18.9 cert3 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:* | 18.9 cert4 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:* | 18.9 cert5 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:* | 18.9 cert6 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:* | 18.9 cert7 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8:*:*:*:*:*:* | 18.9 cert8 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc1:*:*:*:*:*:* | 18.9 cert8-rc1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc2:*:*:*:*:*:* | 18.9 cert8-rc2 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:18.9:cert9:*:*:*:*:*:* | 18.9 cert9 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:* | 20.7 cert1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:* | 20.7 cert1-rc1 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:* | 20.7 cert1-rc2 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:* | 20.7 cert2 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:* | 20.7 cert3 | Vulnerable | Sangoma |
| cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:* | 20.7 cert4 | Vulnerable | Sangoma |
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:* Versions 18.9 cert3 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:* Versions 18.9 cert4 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:* Versions 18.9 cert5 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:* Versions 18.9 cert6 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:* Versions 18.9 cert7 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8:*:*:*:*:*:* Versions 18.9 cert8 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc1:*:*:*:*:*:* Versions 18.9 cert8-rc1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc2:*:*:*:*:*:* Versions 18.9 cert8-rc2 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:18.9:cert9:*:*:*:*:*:* Versions 18.9 cert9 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:* Versions 20.7 cert1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:* Versions 20.7 cert1-rc1 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:* Versions 20.7 cert1-rc2 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:* Versions 20.7 cert2 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:* Versions 20.7 cert3 Vulnerable ·Sangoma
- cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:* Versions 20.7 cert4 Vulnerable ·Sangoma
Remediation
- Fix · CNA asterisk (asterisk) Fixed in 18.9-cert14, 18.26.2, 20.7-cert5, 20.14.1, 21.9.1, 22.4.1
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-47780
References
More asterisk vulnerabilities
- TI-2025-30244 Using malformed From header can forge identity with ";" or NULL in name portion CVSS 3.1HIGH 7.7
- TI-2023-27195 Asterisk susceptible to Denial of Service via DTLS Hello packets during call initiation CVSS 3.1HIGH 7.5
- TI-2024-28351 Asterisk allows `Write=originate` as sufficient permissions for code execution / `System()` dialplan CVSS 3.1HIGH 8.8
- TI-2025-00959 Asterisk Unsafe Shell Sourcing in safe_asterisk Leads to Local Privilege Escalation CVSS 4.0HIGH 7.0
- TI-2025-34699 Asterisk remotely exploitable leak of RTP UDP ports and internal resources CVSS 3.1MEDIUM 6.5
- TI-2025-31747 Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation CVSS 3.1MEDIUM 6.5
Sources
- CVE-2025-47780 · CVE Program
- CVE-2025-47780 · NVD
- FIRST EPSS
- CVE-2025-47780 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences