CVE-2025-47779 - CVE House
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Status published High CVE-2025-47779

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

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2024-42491
A malformed Contact or Record-Route URI in an incoming SIP request can cause Asterisk to crash when res_resolver_unbound is used
Medium 5.7

Affected Vendor

Affected Software

asterisk
Vulnerable Versions:
< 18.9-cert14, >= 18.10, < 18.26.2, >= 20.0, < 20.7-cert5, >= 20.8, < 20.14.1, >= 21.0, < 21.9.1, >= 22.0, < 22.4.1

Timeline

Official Publish: May 22nd, 2025
Last Modified: November 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Weaknesses (CWE)

CWE-140 CWE-792

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.