Unauthorized modification of displayed content in BEx Web, SAP security note 1689059

SAP security note 1689059, "Unauthorized modification of displayed content in BEx Web", is a program error note released on 11.12.2012. Below are the symptom and SAP recommended solution.

Description

Symptom

BEx Web 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

SAP NetWeaver 7.0 BI Java: import Support Package 28 for SAP NetWeaver 7.0 BI Java into your BI system. See note 1724450. In urgent cases the correction instruction via BI JAVA patches can be used: import BI JAVA Patch SP27 #20 (Support Package 27, Patch level 20) for SAP NetWeaver 7.0 BI JAVA into your BI-System. See note 1743929.

SAP NetWeaver BI 7.01 (SAP NW BI 7.0 EhP 1): import Support Package 13 for SAP NW BI7.0 EhP 1 BI JAVA into your BI-System. See note 1724503. In urgent cases the correction instruction via BI JAVA patches can be used: import BI JAVA Patch SP12 #20 (Support Package 12, Patch level 20) for SAP EHP1 for NetWeaver 7.0 (7.01) BI JAVA into your BI-System. See note 1743932.

SAP NetWeaver BI 7.30 (SAP NW BI 7.30): import BI Java Patch for SAP NW 7.30 BI JAVA into your BI-System. See note 1622302 for detailed delivery information and other available patch options. This note will be released when the correction is available for download or delivery information is already available. Refer also to the note 1512355 with delivery schedule.

SAP Business Objects Enterprise 4.0 (SAP BI 4.0): import BI Web Applications Patch for SAP BOE 4.0 into your BOE-System. See note 1622302 for detailed delivery information and other available patch options. This note will be released when the correction is available for download or delivery information is already available.

All the notes mentioned above will be available when the corresponding Support Package or Patch is released to SMP. For other details please refer to the Generic Information Note 1506722.

Reason and prerequisites

Pages within BEx Web do not sufficiently encode 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. 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.

References