CVE-2025-49832
Asterisk is Vulnerable to Remote DoS and possible RCE Attacks During Memory Allocation
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.
INFO
Published Date :
Aug. 1, 2025, 6:15 p.m.
Last Modified :
Aug. 4, 2025, 3:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Asterisk to version 18.26.3 or later.
- Update Asterisk to version 20.15.1 or later.
- Update Asterisk to version 21.10.1 or later.
- Update Asterisk to version 22.5.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-49832.
| URL | Resource |
|---|---|
| https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-49832 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-49832
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-49832 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-49832 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 25, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions up to (excluding) 18.26.3 *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 20.0.0 up to (excluding) 20.15.1 *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 21.0.0 up to (excluding) 21.10.1 *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 22.0.0 up to (excluding) 22.5.1 Added CPE Configuration OR *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* versions up to (including) 18.9 *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:* Added Reference Type GitHub, Inc.: https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Aug. 01, 2025
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added Reference https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr