Description:
Deniz Cevik has reported a vulnerability in Oracle Application Server,
which can be exploited by malicious people to bypass certain security
restrictions.

The problem is that basic authentication in Oracle Application Server
Portal can be bypassed to read the content of "/dav_portal/portal/"
via a specially crafted session ID in the cookie, which is e.g. set
when accessing "/pls/portal/%0A".

The vulnerability is reported in Oracle Application Server 10g Portal.
Other versions may also be affected.

Solution:
Restrict network access to affected systems
Affected Software/Device: Oracle Application Server Portal

Vulnerability: Authentication Bypass

Tested Version: 10G

Risk: Medium

Description:

Oracle Application Server Portal (OracleAS Portal) is a Web-based
application for building and deploying portals. It provides a secure,
manageable environment for accessing and interacting with enterprise
software services and information resources.

Initially /dav_tal/portal/ directory is being protected using basic
authentication. It is possible to bypass and access content of
dav_portal by adding a specially crafted cookie value in the http
request header.

Sample Request:

In order to construct a special http request first visit
"http:/site/pls/portal/%0A" url. This request adds special session id
into cookie. Subsequent connection attempts to
"http://site/dav_portal/portal/" will reveal the contents of directory
without any authentication.

Deniz CEVIK
www.intellectpro.com.tr