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             AUSCERT External Security Bulletin Redistribution

                libapache2-mod-auth-mellon security update
                               25 March 2019


        AusCERT Security Bulletin Summary

Product:           libapache2-mod-auth-mellon
Publisher:         Debian
Operating System:  Debian GNU/Linux 9
                   Linux variants
Impact/Access:     Provide Misleading Information -- Remote/Unauthenticated
                   Unauthorised Access            -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-3878 CVE-2019-3877 

Original Bulletin: 

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running libapache2-mod-auth-mellon check for an updated version of 
         the software for their operating system.

Revision History:  March 25 2019: Corrected impact/access
                   March 25 2019: Initial Release

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- --------------------------------------------------------------------------
Debian Security Advisory DSA-4414-1                   security@debian.org
https://www.debian.org/security/                          Thijs Kinkhorst
March 23, 2019                        https://www.debian.org/security/faq
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Package        : libapache2-mod-auth-mellon
CVE ID         : CVE-2019-3877 CVE-2019-3878
Debian Bug     : 925197

Several issues have been discovered in Apache module auth_mellon, which
provides SAML 2.0 authentication.


    It was possible to bypass the redirect URL checking on logout, so
    the module could be used as an open redirect facility.


    When mod_auth_mellon is used in an Apache configuration which
    serves as a remote proxy with the http_proxy module, it was
    possible to bypass authentication by sending SAML ECP headers.

For the stable distribution (stretch), these problems have been fixed in
version 0.12.0-2+deb9u1.

We recommend that you upgrade your libapache2-mod-auth-mellon packages.

For the detailed security status of libapache2-mod-auth-mellon please
refer to its security tracker page at:

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

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