SecuriTricks - CVE-2025-49832

Description

Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.

Product(s) Impacted

Vendor	Product	Versions
Asterisk	Asterisk	<18.26.3, 20.0.0-20.15.0, 20.7-cert6, 21.0.0, 22.0.0-22.5.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-476

NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	asterisk	asterisk	<18.26.3	/	/	/	/	/	/	/
a	asterisk	asterisk	20.0.0-20.15.0	/	/	/	/	/	/	/
a	asterisk	asterisk	20.7-cert6	/	/	/	/	/	/	/
a	asterisk	asterisk	21.0.0	/	/	/	/	/	/	/
a	asterisk	asterisk	22.0.0-22.5.0	/	/	/	/	/	/	/

References

https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr

CVSS Score

6.5 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

View Vector String

Timeline

Published: Aug. 1, 2025, 6:15 p.m.
Last Modified: Aug. 1, 2025, 6:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security-advisories@github.com

CVE-2025-49832