CVE-2011-4597

    Dashboard / Vulnerabilities / CVE-2011-4597

    CVE-2011-4597

    Published: 15 Dec 2011Last Modified: 10 Apr 2026

    Summary:

    Details: The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.

    References: http://secunia.com/advisories/47273, http://www.debian.org/security/2011/dsa-2367, http://archives.neohapsis.com/archives/bugtraq/2011-12/0151.html, http://downloads.asterisk.org/pub/security/AST-2011-013.html, http://lists.digium.com/pipermail/asterisk-dev/2011-November/052191.html, http://openwall.com/lists/oss-security/2011/12/09/3, http://openwall.com/lists/oss-security/2011/12/09/4, http://osvdb.org/77597

    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