ESB-2019.1316 - [RedHat] mod_auth_mellon: Unauthorised access - Remote/unauthenticated 2019-04-17

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.1316
          Important: mod_auth_mellon security and bug fix update
                               17 April 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           mod_auth_mellon
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-3878 CVE-2019-3877 

Reference:         ESB-2019.1256
                   ESB-2019.1049
                   ESB-2019.0965.2

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2019:0766

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: mod_auth_mellon security and bug fix update
Advisory ID:       RHSA-2019:0766-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:0766
Issue date:        2019-04-16
CVE Names:         CVE-2019-3877 CVE-2019-3878 
=====================================================================

1. Summary:

An update for mod_auth_mellon is now available for Red Hat Enterprise Linux
7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x

3. Description:

The mod_auth_mellon module for the Apache HTTP Server is an authentication
service that implements the SAML 2.0 federation protocol. The module grants
access based on the attributes received in assertions generated by an IdP
server.

Security Fix(es):

* mod_auth_mellon: authentication bypass in ECP flow (CVE-2019-3878)

* mod_auth_mellon: open redirect in logout url when using URLs with
backslashes (CVE-2019-3877)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Bug Fix(es):

* mod_auth_mellon Cert files name wrong when hostname contains a number
(fixed in upstream package) (BZ#1697487)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1691125 - CVE-2019-3877 mod_auth_mellon: open redirect in logout url when using URLs with backslashes
1691126 - CVE-2019-3878 mod_auth_mellon: authentication bypass in ECP flow
1697487 - mod_auth_mellon Cert files name wrong when hostname contains a number (fixed in upstream package) [rhel-7.6.z]

6. Package List:

Red Hat Enterprise Linux Server (v. 7):

Source:
mod_auth_mellon-0.14.0-2.el7_6.4.src.rpm

ppc64:
mod_auth_mellon-0.14.0-2.el7_6.4.ppc64.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64.rpm

ppc64le:
mod_auth_mellon-0.14.0-2.el7_6.4.ppc64le.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64le.rpm

s390x:
mod_auth_mellon-0.14.0-2.el7_6.4.s390x.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.s390x.rpm

x86_64:
mod_auth_mellon-0.14.0-2.el7_6.4.x86_64.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
mod_auth_mellon-0.14.0-2.el7_6.4.src.rpm

aarch64:
mod_auth_mellon-0.14.0-2.el7_6.4.aarch64.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.aarch64.rpm

ppc64le:
mod_auth_mellon-0.14.0-2.el7_6.4.ppc64le.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64le.rpm

s390x:
mod_auth_mellon-0.14.0-2.el7_6.4.s390x.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.s390x.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.ppc64.rpm

ppc64le:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64le.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.ppc64le.rpm

s390x:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.s390x.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.s390x.rpm

x86_64:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.x86_64.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):

aarch64:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.aarch64.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.aarch64.rpm

ppc64le:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.ppc64le.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.ppc64le.rpm

s390x:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.s390x.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
mod_auth_mellon-0.14.0-2.el7_6.4.src.rpm

x86_64:
mod_auth_mellon-0.14.0-2.el7_6.4.x86_64.rpm
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
mod_auth_mellon-debuginfo-0.14.0-2.el7_6.4.x86_64.rpm
mod_auth_mellon-diagnostics-0.14.0-2.el7_6.4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2019-3877
https://access.redhat.com/security/cve/CVE-2019-3878
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2019 Red Hat, Inc.
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