CVE-2019-3878

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    CVE-2019-3878

    Published: 26 Mar 2019Last Modified: 8 Jul 2026

    Summary:

    Details: A vulnerability was found in mod_auth_mellon before v0.14.2. If Apache is configured as a reverse proxy and mod_auth_mellon is configured to only let through authenticated users (with the require valid-user directive), adding special HTTP headers that are normally used to start the special SAML ECP (non-browser based) can be used to bypass authentication.

    References: https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/, https://access.redhat.com/errata/RHBA-2019:0959, https://access.redhat.com/errata/RHSA-2019:0746, https://access.redhat.com/errata/RHSA-2019:0766, https://access.redhat.com/errata/RHSA-2019:0985, https://usn.ubuntu.com/3924-1/, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878, https://github.com/Uninett/mod_auth_mellon/pull/196

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -7d681177cb23253e1136afd18cb1916f3865554e

    Affected versions

    v0.14.1
    v0.14.0

    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