medium6.5
CVE-2025-49832
Asterisk is an open source private branch exchange and telephony toolkit.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Sangoma | Asterisk | before 18.26.3 from 20.0.0 before 20.15.1 from 21.0.0 before 21.10.1 from 22.0.0 before 22.5.1 |
| Sangoma | Certified Asterisk | through 18.9 Version 20.7 |