Description
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.
CVSS Metrics
- Vector
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- network
- Access Cmplx
- medium
- Auth
- none
- Confidentiality
- none
- Integrity
- none
- Availability
- partial
- Weaknesses
- CWE-287
Metadata
- Primary Vendor
- ASTERISK
- Published
- 4/23/2008
- Last Modified
- 4/9/2025
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
asterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_appliance_developer_kitasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisk_business_editionasterisk : asterisknowasterisk : asterisknowasterisk : asterisknowasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : open_sourceasterisk : s800iasterisk : s800iasterisk : s800iasterisk : s800iasterisk : s800iasterisk : s800iasterisk : s800iasterisk : s800i
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