The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.x before 1.8.23.1, 10.x before 10.12.3, and 11.x before 11.5.1; Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2; and Asterisk Digiumphones 10.x-digiumphones before 10.12.3-digiumphones allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an invalid SDP that defines a media description before the connection description in a SIP request.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade asterisk | Jul 30, 2024 | Sep 9, 2013 |
| Freebsd | — | Upgrade asterisk10Upgrade asterisk11Upgrade asterisk18 | Dec 10, 2025 | Aug 28, 2013 |
| Gentoo Linux | — | Upgrade net-misc/asterisk. | Oct 30, 2017 | Sep 9, 2013 |
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