CVE-2025-47779

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

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.

Category

7.7
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.03%
Affected: asterisk asterisk
Published at:
Updated at:

References

Link Tags
https://github.com/asterisk/asterisk/security/advisories/GHSA-2grh-7mhv-fcfw
https://github.com/asterisk/asterisk/blob/master/configs/samples/pjsip.conf.sample

Frequently Asked Questions

What is the severity of CVE-2025-47779?
CVE-2025-47779 has been scored as a high severity vulnerability.
How to fix CVE-2025-47779?
To fix CVE-2025-47779, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-47779 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-47779 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-47779?
CVE-2025-47779 affects asterisk asterisk.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.