CVE-2007-4103

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    CVE-2007-4103

    Published: 31 Jul 2007Last Modified: 10 Apr 2026

    Summary:

    Details: The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.

    References: http://secunia.com/advisories/26274, http://secunia.com/advisories/29051, http://security.gentoo.org/glsa/glsa-200802-11.xml, http://www.securityfocus.com/archive/1/475069/100/0/threaded, http://www.securityfocus.com/bid/24950, http://www.securitytracker.com/id?1018472, http://www.vupen.com/english/advisories/2007/2701, http://bugs.gentoo.org/show_bug.cgi?id=185713, http://ftp.digium.com/pub/asa/ASA-2007-018.pdf, http://secunia.com/advisories/26274, http://bugs.gentoo.org/show_bug.cgi?id=185713, http://ftp.digium.com/pub/asa/ASA-2007-018.pdf, http://osvdb.org/38197, http://securityreason.com/securityalert/2960, http://www.securityfocus.com/archive/1/475069/100/0/threaded, http://www.securityfocus.com/bid/24950, http://www.securitytracker.com/id?1018472

    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