(The following advisory is also available in PDF format for download at:
http://www.cybsec.com/vuln/CYBSEC_Security_Advisory_Phishing_Vector_in_SAP_BC.pdf )

CYBSEC S.A.
www.cybsec.com

Advisory Name: Phishing Vector in SAP BC (Business Connector)

Vulnerability Class: Phishing Vector / Improper Input Validation

Release Date: 05/15/2006

Affected Applications:

• SAP BC Core Fix 7 (and below)

Affected Platforms:

• Platform-Independent

Local / Remote: Remote

Severity: Low

Author: Leandro Meiners.

Vendor Status:

• Confirmed, patch released.

Reference to Vulnerability Disclosure Policy:
http://www.cybsec.com/vulnerability_policy.pdf

Product Overview:

SAP Business Connector (SAP BC) is a middleware application based on B2B
integration server from webMethods. It enables communication between SAP
applications and SAP R/3 and non-SAP applications, by making all SAP
functions accessible to business partners over the Internet as an
XML-based service.
The SAP Business Connector uses the Internet as a communication platform
and XML or HTML as the data format. It integrates non-SAP products by
using an open, non-proprietary technology.

Vulnerability Description:

SAP BC was found to provide a vector to allow Phishing scams against the
SAP BC administrator.

Technical Details:

The parameter url of the page adapter-index.dsp allows absolute URLs,
such as http://www.google.com. This can be used to mount a Phishing scam
by sending a link like
http://sapbc/WmRoot/adapter-index.dsp?url=http://www.attacker.com that
if clicked by the administrator (while logged in, or logs in after
clicking) will load the attacker's site webpage inside an HTML frame.

Impact:

This can be used to mount a Phishing scam by sending a link, that if
clicked by the administrator (while logged in, or logs in after
clicking) will load the attacker's site webpage inside an HTML frame.

Solutions:

SAP released a patch regarding this issue, which requires Server Core
Fix 7. Details can be found in SAP note 908349.

Vendor Response:

• 12/06/2005: Initial Vendor Contact.
• 12/07/2005: Technical details for the vulnerabilities sent to vendor.
• 12/19/2005: Solutions provided by vendor for all vulnerabilities.
• 02/15/2006: Coordinate release of pre-advisory without technical
  details.
• 05/15/2006: Coordinate release of advisory with technical details.

Contact Information:

For more information regarding the vulnerability feel free to contact
the author at lmeiners<at>cybsec.com.

For more information regarding CYBSEC: www.cybsec.com

---

Leandro Meiners
CYBSEC S.A. Security Systems
E-mail: [email protected]
Tel/Fax: [54-11] 4382-1600
Web: http://www.cybsec.com
PGP-Key: http://pgp.mit.edu:11371/pks/lookup?search=lmeiners&amp;op=index