python-pysaml2: Unauthorised Access -- Remote/Unauthenticated

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.0093
                     USN-3520-1: PySAML2 vulnerability
                              9 January 2018

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

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

Product:           python-pysaml2
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-1000433  

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3517-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running python-pysaml2 check for an updated version of the software
         for their operating system.

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-3520-1: PySAML2 vulnerability
Ubuntu Security Notice USN-3520-1

8th January, 2018
python-pysaml2 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

    Ubuntu 17.10
    Ubuntu 17.04
    Ubuntu 16.04 LTS

Summary

PySAML2 could allow authentication without a password.
Software description

    python-pysaml2 - Pure python implementation of SAML2

Details

It was discovered that PySAML2 incorrectly accepted any password when run
with python optimizations enabled. An attacker could use this issue to
authenticate as any user without a valid password.
Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 17.10:
    python-pysaml2 3.0.0-3ubuntu2.2 
    python3-pysaml2 3.0.0-3ubuntu2.2 
Ubuntu 17.04:
    python-pysaml2 3.0.0-3ubuntu1.17.04.3 
    python3-pysaml2 3.0.0-3ubuntu1.17.04.3 
Ubuntu 16.04 LTS:
    python-pysaml2 3.0.0-3ubuntu1.16.04.3 
    python3-pysaml2 3.0.0-3ubuntu1.16.04.3 

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.
References

CVE-2017-1000433

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=VLia
-----END PGP SIGNATURE-----