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    CVE-2008-1923

    The IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when configured to allow unauthenticated calls, sends "early audio" to an unverified source IP address of a NEW message, which allows remote attackers to cause a denial of service (traffic amplification) via a spoofed NEW message.

    Published:Apr 23, 2008
    Last Modified:Apr 23, 2026
    EPS:Apr 23, 2008
    EPSS Score:0.01525
    CVSS Score:7.1

    Affected Products

    Vendor
    Asterisk
    Product
    Asterisk Appliance Developer Kit
    Vendor
    Asterisk
    Product
    Asterisk Business Edition
    Vendor
    Asterisk
    Product
    Asterisknow
    Vendor
    Asterisk
    Product
    Open Source
    Vendor
    Asterisk
    Product
    S800i

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2008-3264 (CVSS 7.8) — The FWDOWNL firmware-download implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x bef…
    CVE-2008-1897 (CVSS 4.3) — 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 1.4.1…
    CVE-2008-1289 (CVSS 7.5) — Multiple buffer overflows in Asterisk Open Source 1.4.x before 1.4.18.1 and 1.4.19-rc3, Open Source 1.6.x befo…
    CVE-2008-1390 (CVSS 9.3) — The AsteriskGUI HTTP server in Asterisk Open Source 1.4.x before 1.4.19-rc3 and 1.6.x before 1.6.0-beta6, Busi…
    CVE-2008-1332 (CVSS 8.8) — Unspecified vulnerability in Asterisk Open Source 1.2.x before 1.2.27, 1.4.x before 1.4.18.1 and 1.4.19-rc3; B…
    CVE-2008-0095 (CVSS 5) — The SIP channel driver in Asterisk Open Source 1.4.x before 1.4.17, Business Edition before C.1.0-beta8, Aster…
    CVE-2007-4455 (CVSS 5) — The SIP channel driver (chan_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Aster…
    CVE-2007-4280 (CVSS 3.5) — The Skinny channel driver (chan_skinny) in Asterisk Open Source before 1.4.10, AsteriskNOW before beta7, Appli…
    CVE-2007-3764 (CVSS 5) — The Skinny channel driver (chan_skinny) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition bef…
    CVE-2007-3763 (CVSS 5) — The IAX2 channel driver (chan_iax2) in Asterisk before 1.2.22 and 1.4.x before 1.4.8, Business Edition before …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High