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    CVE-2008-5558

    Asterisk Open Source 1.2.26 through 1.2.30.3 and Business Edition B.2.3.5 through B.2.5.5, when realtime IAX2 users are enabled, allows remote attackers to cause a denial of service (crash) via authentication attempts involving (1) an unknown user or (2) a user using hostname matching.

    Published:Dec 17, 2008
    Last Modified:Apr 23, 2026
    EPS:Dec 17, 2008
    EPSS Score:0.02095
    CVSS Score:4.3

    Affected Products

    Vendor
    Asterisk
    Product
    Asterisk Business Edition
    Vendor
    Asterisk
    Product
    Open Source

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2009-0041 (CVSS 5) — IAX2 in Asterisk Open Source 1.2.x before 1.2.31, 1.4.x before 1.4.23-rc4, and 1.6.x before 1.6.0.3-rc2; Busin…
    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-2008-2119 (CVSS 4.3) — Asterisk Open Source 1.0.x and 1.2.x before 1.2.29 and Business Edition A.x.x and B.x.x before B.2.5.3, when p…
    CVE-2008-1923 (CVSS 7.1) — The IAX2 channel driver (chan_iax2) in Asterisk 1.2 before revision 72630 and 1.4 before revision 65679, when …
    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-2007-6430 (CVSS 4.3) — Asterisk Open Source 1.2.x before 1.2.26 and 1.4.x before 1.4.16, and Business Edition B.x.x before B.2.3.6 an…

    References

    http://downloads.digium.com/pub/security/AST-2008-012.html
    http://osvdb.org/50675
    http://secunia.com/advisories/32956
    http://secunia.com/advisories/34982
    http://security.gentoo.org/glsa/glsa-200905-01.xml
    http://securityreason.com/securityalert/4769
    http://www.securityfocus.com/archive/1/499117/100/0/threaded
    http://www.securityfocus.com/bid/32773
    http://www.securitytracker.com/id?1021378
    http://www.vupen.com/english/advisories/2008/3403
    http://downloads.digium.com/pub/security/AST-2008-012.html
    http://osvdb.org/50675
    http://secunia.com/advisories/32956
    http://secunia.com/advisories/34982
    http://security.gentoo.org/glsa/glsa-200905-01.xml
    http://securityreason.com/securityalert/4769
    http://www.securityfocus.com/archive/1/499117/100/0/threaded
    http://www.securityfocus.com/bid/32773
    http://www.securitytracker.com/id?1021378
    http://www.vupen.com/english/advisories/2008/3403

    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