CVE-2011-4869

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    CVE-2011-4869

    Published: 20 Dec 2011Last Modified: 10 Apr 2026

    Summary:

    Details: validator/val_nsec3.c in Unbound before 1.4.13p2 does not properly perform proof processing for NSEC3-signed zones, which allows remote DNS servers to cause a denial of service (daemon crash) via a malformed response that lacks expected NSEC3 records, a different vulnerability than CVE-2011-4528.

    References: http://secunia.com/advisories/47326, http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt, http://www.debian.org/security/2011/dsa-2370, http://unbound.nlnetlabs.nl/downloads/CVE-2011-4528.txt, http://www.kb.cert.org/vuls/id/209659, http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071525.html, http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071535.html, http://osvdb.org/77910, http://www.kb.cert.org/vuls/id/209659, https://exchange.xforce.ibmcloud.com/vulnerabilities/71868

    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