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CVE-2025-49832

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Date: August 1, 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.

Severity Score

Related Resources (4)

https://security-tracker.debian.org/tracker/CVE-2025-49832
https://nvd.nist.gov/vuln/detail/CVE-2025-49832
https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr
https://www.mend.io/vulnerability-database/CVE-2025-49832

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

Top Fix

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Upgrade Version

Upgrade to version https://github.com/asterisk/asterisk.git - 18.26.3;https://github.com/asterisk/asterisk.git - 20.7-cert7;https://github.com/asterisk/asterisk.git - 20.15.1;https://github.com/asterisk/asterisk.git - 21.10.1;https://github.com/asterisk/asterisk.git - 22.5.1

Learn More

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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