CVE-2025-49832
Last modified
CVE-2025-49832 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Sangoma | Asterisk | < 18.26.3 | — |
| Sangoma | Asterisk | >= 20.0.0, < 20.15.1 | — |
| Sangoma | Asterisk | >= 21.0.0, < 21.10.1 | — |
| Sangoma | Asterisk | >= 22.0.0, < 22.5.1 | — |
| Sangoma | Certified Asterisk | <= 18.9 | — |
| Sangoma | Certified Asterisk | 20.7 | Cert1 |
References
- https://github.com/asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5crExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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