CVE-2025-47779

Using malformed From header can forge identity with ";" or NULL in name portion

Published May 22, 2025 CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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, SIP requests of the type MESSAGE (RFC 3428) authentication do not get proper alignment. An authenticated attacker can spoof any user identity to send spam messages to the user with their authorization token. Abuse of this security issue allows authenticated attackers to send fake chat messages can be spoofed to appear to come from trusted entities. Even administrators who follow Security best practices and Security Considerations can be impacted. Therefore, abuse can lead to spam and enable social engineering, phishing and similar attacks. 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4206-1 asterisk security update
EUVD EUVD EUVD-2025-16166 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, SIP requests of the type MESSAGE (RFC 3428) authentication do not get proper alignment. An authenticated attacker can spoof any user identity to send spam messages to the user with their authorization token. Abuse of this security issue allows authenticated attackers to send fake chat messages can be spoofed to appear to come from trusted entities. Even administrators who follow Security best practices and Security Considerations can be impacted. Therefore, abuse can lead to spam and enable social engineering, phishing and similar attacks. 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.
History
Type Values Removed Values Added
First Time appeared Sangoma
Sangoma asterisk
Sangoma certified Asterisk
CPEs cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert12:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert13:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert9:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*
Vendors & Products Sangoma
Sangoma asterisk
Sangoma certified Asterisk
References
Type Values Removed Values Added
Metrics epss

{'score': 0.00081}

epss

{'score': 0.00067}

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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, SIP requests of the type MESSAGE (RFC 3428) authentication do not get proper alignment. An authenticated attacker can spoof any user identity to send spam messages to the user with their authorization token. Abuse of this security issue allows authenticated attackers to send fake chat messages can be spoofed to appear to come from trusted entities. Even administrators who follow Security best practices and Security Considerations can be impacted. Therefore, abuse can lead to spam and enable social engineering, phishing and similar attacks. 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.
Title Using malformed From header can forge identity with ";" or NULL in name portion
Weaknesses CWE-140
CWE-792
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Nov 3, 2025, 8:04 PM
Reserved
May 9, 2025, 7:49 PM
Status
Modified
Published
May 22, 2025, 5:15 PM
Modified
Jun 17, 2026, 9:28 AM
Severity
Important
Public date
May 22, 2025, 4:54 PM