AOH :: HP Unsorted C :: TB10351.HTM

Cosign SSO Authentication Bypass



Cosign SSO Authentication Bypass
Cosign SSO Authentication Bypass




--=-sZ6O20a2o7kJTCjriroL
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

Author: Jon Oberheide  
Date:    Wed, April 11th, 2007


Summary
======
Application:              Cosign Single Sign-On
Affected Versions:        2.0.1 and previous
Vendor Website: http://weblogin.org 
Type of Vulnerability:    Authentication Bypass - Remote


Background
=========
cosign is a web single-sign-on system.  Written at the University of
Michigan, cosign is an open source software project and a part of the
National Science Foundation Middleware Initiative (NMI) EDIT software
release.  cosign is deployed extensively at the University of Michigan
and at educational institutions and other organizations around the
world.


Description
==========
Two critical remote vulnerabilities exist within the CGI component of
cosign allowing authentication bypass and impersonation of an arbitrary
user.  The full details of each vulnerability can be found at the
following links:

http://www.umich.edu/~umweb/software/cosign/cosign-vuln-2007-001.txt 
http://www.umich.edu/~umweb/software/cosign/cosign-vuln-2007-002.txt 


Resolution
=========
Organizations utilizing cosign should upgrade to versions 1.9.4b or
2.0.2a available at http://weblogin.org. 

-- 
Jon Oberheide  
GnuPG Key: 1024D/F47C17FE
Fingerprint: B716 DA66 8173 6EDD 28F6  F184 5842 1C89 F47C 17FE

--=-sZ6O20a2o7kJTCjriroL
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)

iD8DBQBGHPkGWEIcifR8F/4RAnnZAJ9IsWjmJ6+s6h/68ssEXrykpE9l4ACg8614
LvjPhCRJZpUkrJ/t6GRdPq0=8S0b
-----END PGP SIGNATURE-----

--=-sZ6O20a2o7kJTCjriroL--


The entire AOH site is optimized to look best in Firefox® 3 on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2014 AOH
We do not send spam. If you have received spam bearing an artofhacking.com email address, please forward it with full headers to abuse@artofhacking.com.