CVE-2025-47779

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

Severity Score

7.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

Complete

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

Poc

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2025-05-09 CVE Reserved
2025-05-22 CVE Published
2025-05-22 CVE Updated
2025-06-23 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-140: Improper Neutralization of Delimiters
CWE-792: Incomplete Filtering of One or More Instances of Special Elements

CAPEC

References (2)

URL	Tag	Source
https://github.com/asterisk/asterisk/blob/master/configs/samples/pjsip.conf.sample	X_refsource_misc
https://github.com/asterisk/asterisk/security/advisories/GHSA-2grh-7mhv-fcfw	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				< 18.9 Search vendor "Asterisk" for product "Asterisk" and version " < 18.9"		en		Affected
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				>= 18.10.0 < 18.26.2 Search vendor "Asterisk" for product "Asterisk" and version " >= 18.10.0 < 18.26.2"		en		Affected
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				>= 20.0 < 20.7 Search vendor "Asterisk" for product "Asterisk" and version " >= 20.0 < 20.7"		en		Affected
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				>= 20.8.0 < 20.14.1 Search vendor "Asterisk" for product "Asterisk" and version " >= 20.8.0 < 20.14.1"		en		Affected
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				>= 21.0.0 < 21.9.1 Search vendor "Asterisk" for product "Asterisk" and version " >= 21.0.0 < 21.9.1"		en		Affected
Asterisk Search vendor "Asterisk"		Asterisk Search vendor "Asterisk" for product "Asterisk"				>= 22.0.0 < 22.4.1 Search vendor "Asterisk" for product "Asterisk" and version " >= 22.0.0 < 22.4.1"		en		Affected