UBUNTU-CVE-2019-3878

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    UBUNTU-CVE-2019-3878

    Published: 21 Mar 2019Last Modified: 4 Feb 2026
    Upstream:
    CVE-2019-3878

    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://ubuntu.com/security/CVE-2019-3878, https://github.com/Uninett/mod_auth_mellon/pull/196, https://ubuntu.com/security/notices/USN-3924-1, https://ubuntu.com/security/notices/USN-4597-1, https://www.cve.org/CVERecord?id=CVE-2019-3878

    Affected packages

    Package

    Name: libapache2-mod-auth-mellon

    Purl: pkg:deb/ubuntu/[email protected]+deb9u1build0.16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.12.0-2+deb9u1build0.16.04.1

    Affected versions

    0.10.0-1

    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