The IAX2 channel driver (chan_iax2) in Asterisk Open Source 1.0.x, 1.2.x before 1.2.28, and 1.4.x before 1.4.19.1; Business Edition A.x.x, B.x.x before B.2.5.2, and C.x.x before C.1.8.1; AsteriskNOW before 1.0.3; Appliance Developer Kit 0.x.x; and s800i before 1.1.0.3, when configured to allow unauthenticated calls, does not verify that an ACK response contains a call number matching the server's reply to a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed ACK response that does not complete a 3-way handshake. NOTE: this issue exists because of an incomplete fix for CVE-2008-1923.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade asterisk | Jul 30, 2024 | Apr 23, 2008 |
| Gentoo Linux | — | Upgrade net-misc/asterisk. | Oct 30, 2017 | Apr 23, 2008 |
| Suse | — | Upgrade suse-releaseUpgrade asterisk-alsaUpgrade asterisk-odbcUpgrade asteriskUpgrade asterisk-pgsqlUpgrade asterisk-spandspUpgrade asterisk-zaptel | Dec 12, 2013 | Apr 23, 2008 |
| Ubuntu | — | Upgrade asterisk | Nov 19, 2024 | Apr 23, 2008 |
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