CVE-2008-3903

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    CVE-2008-3903

    Published: 4 Sept 2008Last Modified: 10 Apr 2026

    Summary:

    Details: Asterisk Open Source 1.2.x before 1.2.32, 1.4.x before 1.4.24.1, and 1.6.0.x before 1.6.0.8; Asterisk Business Edition A.x.x, B.x.x before B.2.5.8, C.1.x.x before C.1.10.5, and C.2.x.x before C.2.3.3; s800i 1.3.x before 1.3.0.2; and Trixbox PBX 2.6.1, when Digest authentication and authalwaysreject are enabled, generates different responses depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames.

    References: http://secunia.com/advisories/34982, http://secunia.com/advisories/37677, http://security.gentoo.org/glsa/glsa-200905-01.xml, http://www.debian.org/security/2009/dsa-1952, http://www.vupen.com/english/advisories/2009/0933, http://downloads.asterisk.org/pub/security/AST-2009-003.html, http://misel.com/?p=52, http://www.securityfocus.com/bid/34353, https://exchange.xforce.ibmcloud.com/vulnerabilities/45059

    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