SAP security note 1656918, “Unauthorized modification of displayed content in UAD_xx”. Below are the symptom and SAP recommended solution.
Description
Symptom
The components UAD_xx 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.
The changes that come with this correction will include a switch of the HTMLB-design for the following applications:
- UAD_MAIN
- UAD_REG_CONSUM
- UAD_REG_CONSUMX
- UAD_REG_CONTPER
- UAD_CHG_BUPA
- UAD_CHG_BUPAX
- UAD_CHG_ORG_CP
- UAD_CHG_CONTPER
The design defines how the application is rendered. If the application was rendered with CLASSIC or DESIGN2002, it will now use DESIGN2003. There will be no impact on the functionality of your application. Switching to the new design is necessary due to compatibility reasons that were not fulfilled by CLASSIC and DESIGN2002.
Reason and prerequisites
Pages within the components UAD_xx 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.
References
This note refers to
Full note on SAP: SAP Support Launchpad note 1656918
Detailed exploitation and proof-of-concept material for this note is maintained in the RedRays Security Platform. For access, contact [email protected].