SAP Security Note
High priority
SAP security note 1706335, “Unauthorized modification of displayed content in NWBC”, is a note released on 19.04.2013. Below are the symptom and SAP recommended solution.
Description
Symptom
NWBC for HTML 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
Please implement the attached correction instruction for your version.
The changed code is used from the following SPs on:
- Release 7.00 SP27
- Release 7.01 SP12
- Release 7.02 SP12
- Release 7.11 SP10
- Release 7.20 SP08
- Release 7.30 SP08
- Release 7.31 SP01
Since the correction is done in exact these SPs – except for release 7.31 – there are only correction instructions for release 7.31 necessary and available.
Reason and prerequisites
Pages within NWBC for HTML 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 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
Full note on SAP: SAP Support Launchpad note 1706335
Detailed exploitation and proof-of-concept material for this note is maintained in the RedRays Security Platform. For access, contact [email protected].
