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.
2008-04-23T16:05:00.000
2025-04-09T00:30:58.490
Deferred
CVSSv2: 4.3 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:N/A:P
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | asterisk | asterisk_appliance_developer_kit | 0.2 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.3 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.4 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.5 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.6 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.6.0 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.7 | Yes |
| Application | asterisk | asterisk_appliance_developer_kit | 0.8 | Yes |
| Application | asterisk | asterisk_business_edition | ≤ b.2.5.1 | Yes |
| Application | asterisk | asterisk_business_edition | ≤ c1.8.0 | Yes |
| Application | asterisk | asterisk_business_edition | a | Yes |
| Application | asterisk | asterisk_business_edition | b.1.3.2 | Yes |
| Application | asterisk | asterisk_business_edition | b.1.3.3 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.2.0 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.2.1 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.3.1 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.3.2 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.3.3 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.3.4 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.3.6 | Yes |
| Application | asterisk | asterisk_business_edition | b.2.5.0 | Yes |
| Application | asterisk | asterisk_business_edition | c.1.0 | Yes |
| Application | asterisk | asterisk_business_edition | c.1.0 | Yes |
| Application | asterisk | asterisk_business_edition | c.1.6 | Yes |
| Application | asterisk | asterisk_business_edition | c.1.6.1 | Yes |
| Application | asterisk | asterisk_business_edition | c.1.6.2 | Yes |
| Application | asterisk | asterisknow | ≤ 1.0.2 | Yes |
| Application | asterisk | asterisknow | 1.0 | Yes |
| Application | asterisk | asterisknow | 1.0.1 | Yes |
| Application | asterisk | open_source | ≤ 1.2.27 | Yes |
| Application | asterisk | open_source | ≤ 1.4.19 | Yes |
| Application | asterisk | open_source | 1.0 | Yes |
| Application | asterisk | open_source | 1.0 | Yes |
| Application | asterisk | open_source | 1.0 | Yes |
| Application | asterisk | open_source | 1.0.0 | Yes |
| Application | asterisk | open_source | 1.0.1 | Yes |
| Application | asterisk | open_source | 1.0.2 | Yes |
| Application | asterisk | open_source | 1.0.3 | Yes |
| Application | asterisk | open_source | 1.0.3.4 | Yes |
| Application | asterisk | open_source | 1.0.4 | Yes |
| Application | asterisk | open_source | 1.0.5 | Yes |
| Application | asterisk | open_source | 1.0.6 | Yes |
| Application | asterisk | open_source | 1.0.7 | Yes |
| Application | asterisk | open_source | 1.0.8 | Yes |
| Application | asterisk | open_source | 1.0.9 | Yes |
| Application | asterisk | open_source | 1.0.11 | Yes |
| Application | asterisk | open_source | 1.0.11 | Yes |
| Application | asterisk | open_source | 1.0.11.1 | Yes |
| Application | asterisk | open_source | 1.0.11.1 | Yes |
| Application | asterisk | open_source | 1.0.12 | Yes |
| Application | asterisk | open_source | 1.0.12 | Yes |
| Application | asterisk | open_source | 1.2.0 | Yes |
| Application | asterisk | open_source | 1.2.0 | Yes |
| Application | asterisk | open_source | 1.2.0 | Yes |
| Application | asterisk | open_source | 1.2.0 | Yes |
| Application | asterisk | open_source | 1.2.0 | Yes |
| Application | asterisk | open_source | 1.2.1 | Yes |
| Application | asterisk | open_source | 1.2.2 | Yes |
| Application | asterisk | open_source | 1.2.2 | Yes |
| Application | asterisk | open_source | 1.2.3 | Yes |
| Application | asterisk | open_source | 1.2.3 | Yes |
| Application | asterisk | open_source | 1.2.4 | Yes |
| Application | asterisk | open_source | 1.2.4 | Yes |
| Application | asterisk | open_source | 1.2.5 | Yes |
| Application | asterisk | open_source | 1.2.5 | Yes |
| Application | asterisk | open_source | 1.2.6 | Yes |
| Application | asterisk | open_source | 1.2.6 | Yes |
| Application | asterisk | open_source | 1.2.7 | Yes |
| Application | asterisk | open_source | 1.2.7 | Yes |
| Application | asterisk | open_source | 1.2.7.1 | Yes |
| Application | asterisk | open_source | 1.2.7.1 | Yes |
| Application | asterisk | open_source | 1.2.8 | Yes |
| Application | asterisk | open_source | 1.2.8 | Yes |
| Application | asterisk | open_source | 1.2.9 | Yes |
| Application | asterisk | open_source | 1.2.9.1 | Yes |
| Application | asterisk | open_source | 1.2.9.1 | Yes |
| Application | asterisk | open_source | 1.2.10 | Yes |
| Application | asterisk | open_source | 1.2.10 | Yes |
| Application | asterisk | open_source | 1.2.11 | Yes |
| Application | asterisk | open_source | 1.2.11 | Yes |
| Application | asterisk | open_source | 1.2.12 | Yes |
| Application | asterisk | open_source | 1.2.12 | Yes |
| Application | asterisk | open_source | 1.2.12.1 | Yes |
| Application | asterisk | open_source | 1.2.12.1 | Yes |
| Application | asterisk | open_source | 1.2.13 | Yes |
| Application | asterisk | open_source | 1.2.13 | Yes |
| Application | asterisk | open_source | 1.2.14 | Yes |
| Application | asterisk | open_source | 1.2.14 | Yes |
| Application | asterisk | open_source | 1.2.15 | Yes |
| Application | asterisk | open_source | 1.2.15 | Yes |
| Application | asterisk | open_source | 1.2.16 | Yes |
| Application | asterisk | open_source | 1.2.16 | Yes |
| Application | asterisk | open_source | 1.2.17 | Yes |
| Application | asterisk | open_source | 1.2.17 | Yes |
| Application | asterisk | open_source | 1.2.18 | Yes |
| Application | asterisk | open_source | 1.2.18 | Yes |
| Application | asterisk | open_source | 1.2.19 | Yes |
| Application | asterisk | open_source | 1.2.19 | Yes |
| Application | asterisk | open_source | 1.2.20 | Yes |
| Application | asterisk | open_source | 1.2.20 | Yes |
| Application | asterisk | open_source | 1.2.21 | Yes |
| Application | asterisk | open_source | 1.2.21 | Yes |
| Application | asterisk | open_source | 1.2.21.1 | Yes |
| Application | asterisk | open_source | 1.2.21.1 | Yes |
| Application | asterisk | open_source | 1.2.22 | Yes |
| Application | asterisk | open_source | 1.2.22 | Yes |
| Application | asterisk | open_source | 1.2.23 | Yes |
| Application | asterisk | open_source | 1.2.23 | Yes |
| Application | asterisk | open_source | 1.2.24 | Yes |
| Application | asterisk | open_source | 1.2.24 | Yes |
| Application | asterisk | open_source | 1.2.25 | Yes |
| Application | asterisk | open_source | 1.2.25 | Yes |
| Application | asterisk | open_source | 1.2.26 | Yes |
| Application | asterisk | open_source | 1.2.26 | Yes |
| Application | asterisk | open_source | 1.2.26.1 | Yes |
| Application | asterisk | open_source | 1.2.26.1 | Yes |
| Application | asterisk | open_source | 1.2.26.2 | Yes |
| Application | asterisk | open_source | 1.2.26.2 | Yes |
| Application | asterisk | open_source | 1.4.0 | Yes |
| Application | asterisk | open_source | 1.4.0 | Yes |
| Application | asterisk | open_source | 1.4.0 | Yes |
| Application | asterisk | open_source | 1.4.0 | Yes |
| Application | asterisk | open_source | 1.4.1 | Yes |
| Application | asterisk | open_source | 1.4.10 | Yes |
| Application | asterisk | open_source | 1.4.10.1 | Yes |
| Application | asterisk | open_source | 1.4.11 | Yes |
| Application | asterisk | open_source | 1.4.12 | Yes |
| Application | asterisk | open_source | 1.4.12.1 | Yes |
| Application | asterisk | open_source | 1.4.13 | Yes |
| Application | asterisk | open_source | 1.4.14 | Yes |
| Application | asterisk | open_source | 1.4.15 | Yes |
| Application | asterisk | open_source | 1.4.16 | Yes |
| Application | asterisk | open_source | 1.4.16.1 | Yes |
| Application | asterisk | open_source | 1.4.16.2 | Yes |
| Application | asterisk | open_source | 1.4.17 | Yes |
| Application | asterisk | open_source | 1.4.18 | Yes |
| Application | asterisk | open_source | 1.4.18.1 | Yes |
| Application | asterisk | s800i | ≤ 1.1.0.2 | Yes |
| Application | asterisk | s800i | 1.0 | Yes |
| Application | asterisk | s800i | 1.0.1 | Yes |
| Application | asterisk | s800i | 1.0.2 | Yes |
| Application | asterisk | s800i | 1.0.3 | Yes |
| Application | asterisk | s800i | 1.0.3.3 | Yes |
| Application | asterisk | s800i | 1.1.0 | Yes |
| Application | asterisk | s800i | 1.1.0.1 | Yes |