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An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name; authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade asterisk | Mar 26, 2024 | Nov 22, 2019 |
| Debian | — | Upgrade asterisk | Dec 2, 2019 | Nov 22, 2019 |
| Freebsd | — | Upgrade asterisk16Upgrade asterisk13 | Nov 22, 2019 | Nov 22, 2019 |
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