NULL Pointer Dereference Affecting asterisk package, versions [,18.26.3)[20.00.0,20.15.1)[20.7-cert1-pre1,20.7-cert7)[21.00.0,21.10.1)[22.00.0,22.5.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-ASTERISK-11431260
- published4 Aug 2025
- disclosed1 Aug 2025
- creditUnknown
Introduced: 1 Aug 2025
NewCVE-2025-49832 (opens in a new tab)How to fix?
Upgrade asterisk to version 18.26.3, 20.15.1, 20.7-cert7, 21.10.1, 22.5.1 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference via the ast_stir_shaken_vs_verify function in the verification.c file, when a user can set an arbitrary Identity header or when STIR/SHAKEN is enabled with verification configured in the SIP profile associated with the targeted endpoint. An attacker can cause a denial of service or potentially execute arbitrary code by sending specially crafted SIP requests.