CVE-2019-3878 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

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://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3878 https://github.com/Uninett/mod_auth_mellon/pull/196 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CNW5YMC5TLWVWNJEY6AIWNSNPRAMWPQJ/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X7NLAU7KROWNTHAYSA2S67X347F42L2I/ https://usn.ubuntu.com/3924-1/

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1