CVE-2025-47779

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.

Reserved 2025-05-09 | Published 2025-05-22 | Updated 2025-05-22 | Assigner GitHub_M

Problem types

CWE-140: Improper Neutralization of Delimiters

CWE-792: Incomplete Filtering of One or More Instances of Special Elements

Product status

< 18.9-cert14
affected

>= 18.10, < 18.26.2
affected

>= 20.0, < 20.7-cert5
affected

>= 20.8, < 20.14.1
affected

>= 21.0, < 21.9.1
affected

>= 22.0, < 22.4.1
affected

References

github.com/...terisk/security/advisories/GHSA-2grh-7mhv-fcfw

github.com/.../blob/master/configs/samples/pjsip.conf.sample

cve.org (CVE-2025-47779)

nvd.nist.gov (CVE-2025-47779)

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