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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sangoma | Asterisk | < 18.26.2 |
| Sangoma | Certified Asterisk | < 18.9 |
Related Weaknesses (CWE)
References
- https://github.com/asterisk/asterisk/blob/master/configs/samples/pjsip.conf.sampProduct
- https://github.com/asterisk/asterisk/security/advisories/GHSA-2grh-7mhv-fcfwExploitVendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/06/msg00003.html
FAQ
What is CVE-2025-47779?
CVE-2025-47779 is a vulnerability with a CVSS score of 7.7 (HIGH). 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...
How severe is CVE-2025-47779?
CVE-2025-47779 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-47779?
Check the references section above for vendor advisories and patch information. Affected products include: Sangoma Asterisk, Sangoma Certified Asterisk.