Unauthorized modification of displayed content in PPM-PRO, SAP security note 1672743

SAP security note 1672743, "Unauthorized modification of displayed content in PPM-PRO", is a program error note released on 08.05.2012. Below are the symptom and SAP recommended solution.

Description

Symptom

PPM-PRO can be abused by an attacker, allowing them to modify displayed application content without authorization, and to potentially obtain authentication information from other legitimate users.

Solution

Implement the correction instructions.

Reason and prerequisites

CL_DPR_EASYDMS_HTTP_HANDLER and CL_DPR_FILE_HTTP_HANDLER within PPM-PRO do not sufficiently encode INPUT | OUTPUT parameters, resulting in a reflected cross-site scripting issue. A reflected cross-site scripting attack can be used to non-permanently deface or modify displayed content from a Web site.

Reflected cross-site scripting can be used to steal another user’s authentication information, such as data relating to their current session. An attacker 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.

References