CVE-2017-11104

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    CVE-2017-11104

    Published: 8 Jul 2017Last Modified: 15 Mar 2026

    Summary:

    Details: Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.

    References: http://www.securityfocus.com/bid/99598, http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html, http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html, http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html, http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html, http://www.debian.org/security/2017/dsa-3910, https://bugs.debian.org/865678, http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf, https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2017-11104 | CVE-DB