CVE-2025-49832
August 01, 2025
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.
Affected Packages
https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=19.0.0 <20.7-cert7Fix Suggestion:
Update to version 20.7-cert7https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=21.0.0 <21.10.1Fix Suggestion:
Update to version 21.10.1https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=22.0.0 <22.5.1Fix Suggestion:
Update to version 22.5.1https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=20.8.0 <20.15.1Fix Suggestion:
Update to version 20.15.1https://github.com/asterisk/asterisk.git (GITHUB):
Affected version(s) >=0.1.0 <18.26.3Fix Suggestion:
Update to version 18.26.3Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
NULL Pointer Dereference
EPSS
Base Score:
0.24
