CVE-2008-1923

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    CVE-2008-1923

    Published: 23 Apr 2008Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://bugs.digium.com/view.php?id=10078, http://downloads.digium.com/pub/security/AST-2008-006.html, http://www.altsci.com/concepts/page.php?s=asteri&p=1, https://exchange.xforce.ibmcloud.com/vulnerabilities/42049

    Affected packages

    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