CVE-2009-3602

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    CVE-2009-3602

    Published: 13 Oct 2009Last Modified: 10 Apr 2026

    Summary:

    Details: Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.

    References: http://secunia.com/advisories/36996, http://secunia.com/advisories/37913, http://unbound.net/pipermail/unbound-users/2009-October/000852.html, http://www.debian.org/security/2009/dsa-1963, http://www.vupen.com/english/advisories/2009/2875, http://osvdb.org/58836, http://www.openwall.com/lists/oss-security/2009/10/09/2, http://www.openwall.com/lists/oss-security/2009/10/09/3, https://exchange.xforce.ibmcloud.com/vulnerabilities/53729

    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