CVE-2008-1897

    Dashboard / Vulnerabilities / CVE-2008-1897

    CVE-2008-1897

    Published: 23 Apr 2008Last Modified: 10 Apr 2026

    Summary:

    Details: 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.

    References: http://secunia.com/advisories/29927, http://secunia.com/advisories/30010, http://secunia.com/advisories/30042, http://secunia.com/advisories/34982, http://security.gentoo.org/glsa/glsa-200905-01.xml, http://www.debian.org/security/2008/dsa-1563, http://www.vupen.com/english/advisories/2008/1324, https://github.com/jcollie/asterisk/commit/60de4fbbdf3ede49f158e23a9e3b679f2e519c1e, https://github.com/jcollie/asterisk/commit/771b3d8749b34b6eea4e03a2e514380da9582f90, https://github.com/jcollie/asterisk/commit/a8b180875b037b8da26f6a3bcc8e5e98b8c904d2, https://github.com/kaoru6/asterisk/commit/1fe14f38dd43dc894d21f85762b51208ba5c8acb, https://github.com/lyx2014/Asterisk/commit/0670e43c30135044e25cca7f80e1833e2c128653, https://github.com/mojolingo/asterisk/commit/20ac3662f137dbf7f42d5295590069a7d3b1166b, https://github.com/pruiz/asterisk/commit/e0ef9bd22810c6969a7f222eec04798f19a7e2d6, https://github.com/silentindark/asterisk-1/commit/fe8b7f31db687f8b9992864b82c93d22833019c7, https://github.com/xrg/asterisk-xrg/commit/10da3dab24e8ca08cf2c983f8d0206e383535b5a, https://github.com/xrg/asterisk-xrg/commit/51714a24347dc57f9a208a4a8af84115ef407b83, 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=2, http://www.securityfocus.com/archive/1/491220/100/0/threaded, http://www.securityfocus.com/bid/28901, http://www.securitytracker.com/id?1019918, https://downloads.asterisk.org/pub/security/AST-2008-006.html, https://exchange.xforce.ibmcloud.com/vulnerabilities/41966, https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00581.html, https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00600.html

    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