CVE-2017-7562

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    CVE-2017-7562

    Published: 26 Jul 2018Last Modified: 8 Jul 2026

    Summary:

    Details: An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.

    References: http://www.securityfocus.com/bid/100511, https://access.redhat.com/errata/RHSA-2018:0666, https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196, https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2, https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562, https://github.com/krb5/krb5/pull/694

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- aca1dccda2da25a5f93227fa4db006c379a961b0
    Fixed -8e153e3e8feb88780413d642273d60f0c15b2fe6

    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