Unauthorized modification in BSP applicat. of EP-PCT-PUR-BP, SAP security note 1676981

SAP security note 1676981, "Unauthorized modification in BSP applicat. of EP-PCT-PUR-BP", is a program error note released on 08.05.2012. Below are the symptom, SAP recommended solution and the affected software components.

Description

Symptom

The BSP applications "Document Tracing" and "Process Deviating Vendor Confirmations" of the Business Package for External Procurement can be abused by a malicious user, allowing them to modify displayed application content without authorization, and to potentially obtain authentication information from other legitimate users.

Solution

Please apply this note or import the changes via the relevant support package.

Reason and prerequisites

The BSPs within the Business Package External Procurement do not sufficiently encode OUTPUT parameters, resulting in a cross-site scripting issue.

Cross-site scripting can be used to steal another user's authentication information, such as data relating to their current session. A malicious user who gains access to this data may use it to impersonate the user and access all information with the same rights as the target user.

If an administrator is impersonated, the security of the application may be fully compromised.

CVSS

Score 0

References

• 1582870 – ABAP XSS Escaping Support
• 1582867 – Security options (XSS) for ESCAPE

Affected components

• SAP_APPL 500
• SAP_APPL 600
• SAP_APPL 602
• SAP_APPL 603
• SAP_APPL 604
• SAP_APPL 605
• SAP_APPL 606