CVE-2025-47779

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

State: Published
Severity: 7.7 High
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, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N	GitHub_M

Weaknesses

CWE-140 Improper Neutralization of Delimiters
CWE-792 Incomplete Filtering of One or More Instances of Special Elements

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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