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CVE-2025-47779

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

Published: May 22, 2025Updated: Nov 3, 2025 Sources: CVE List NVD BDUCWE-140
NVD MITRE
7.7CVSSHIGH
EPSS Score
0.4%
Top 67.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-140CWE-792

Affected Products

asteriskasterisk
On-premWeb App
Communications / voip-telephony
AsteriskDigium, Inc.
On-prem
Communications / voip-telephony
asterisksangoma
On-prem
Communications
certified asterisksangoma
On-prem
Communications / voip-telephony
asteriskoss-projectCommunicationsaka open source, asterisk appliance developer kit
digium, inc.commercialUSCommunicationsaka digium, digium inc.
sangomacommercialCACommunicationsaka freepbx, certified asterisk, asterisk

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://github.com/asterisk/asterisk/security/advisories/GHSA-2grh-7mhv-fcfw
github.com
https://github.com/asterisk/asterisk/blob/master/configs/samples/pjsip.conf.sample
github.com
https://github.com/asterisk/asterisk/security/advisories/GHSA-2grh-7mhv-fcfw
github.com
and 1 more references View all →

Timeline

Published
May 22, 2025
Last Updated
Nov 3, 2025

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