Unauthorized modification of displayed content in BW-BEX, SAP security note 1802724

SAP security note 1802724, "Unauthorized modification of displayed content in BW-BEX", is a program error note released on 12/09/2013. Below are the symptom and SAP recommended solution.

Description

Symptom

This security note replaces security note 1800926.

BW-BEX-ET-WJR-RT 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.

The issue does not occur in releases ≥ 7.3x. In those releases, the requests are blocked by NetWeaver portal infrastructure. Nevertheless, the correction in BI Java was introduced also in those releases to ensure the highest security.

Solution

SAP NetWeaver 7.0 BI Java

• Import Support Package 29 for SAP NetWeaver 7.0 BI Java into your BI system. See note 1724451.

In urgent cases, the correction instruction via BI JAVA patches can be used:

• Import BI JAVA Patch SP27 #40 (Support Package 27, Patch level 40) for SAP NetWeaver 7.0 BI JAVA into your BI-System. See note 1788142.

SAP NetWeaver BI 7.01 (SAP NW BI 7.0 EhP 1)

• Import Support Package 14 for SAP NW BI7.0 EhP 1 BI JAVA into your BI-System. See note 1724504.

In urgent cases, the correction instruction via BI JAVA patches can be used:

• Import BI JAVA Patch SP12 #40 (Support Package 12, Patch level 40) for SAP EHP1 for NetWeaver 7.0 (7.01) BI JAVA into your BI-System. See note 1788236.

SAP NetWeaver BI 7.02 (SAP NW BI 7.0 EhP 2)

• SAP NW BI7.0 EhP2 BI JAVA Support Package and Patches are released in synchronization with the SAP NW BI7.0 EhP1 BI JAVA Support Package and Patches. Please refer to note 1589637.

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 1622307 for detailed delivery information and other available patch options.

SAP NetWeaver BI 7.31 (SAP NW BI 7.31)

• Import BI Java Patch for SAP NW 7.31 BI JAVA into your BI-System. See note 1622307 for detailed delivery information and other available patch options.

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 1622307 for detailed delivery information and other available patch options.

SAP Business Objects Design Studio

• Install Support Package for Design Studio Add-On. See note 1622307 for detailed delivery information and other available patch options.

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

Interfaces within BW-BEX-ET-WJR do not sufficiently encode input 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 website.

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.

CVSS

Score 4.3 Vector: AV:N/AC:M/AU:N/C:N/I:P/A:N

References

• Replaced by: SAP Note 1800926