Unauthorized modification of displayed content in Java Proxy Runtime, SAP security note 2220571

SAP security note 2220571, "Unauthorized modification of displayed content in Java Proxy Runtime", is a program error note released on 09.02.2016. Below are the symptom and SAP recommended solution.

Description

Symptom

Java Proxy Runtime (JPR) can be abused by an attacker, allowing them to modify displayed application content without authorization, and potentially obtain authentication information from other legitimate users.

Solution

This issue is fixed with the Support Packages and Patches of the Software Components referenced by this note in the section "SP Patch Level". Ensure to apply the relevant patches to mitigate the vulnerability.

Reason and prerequisites

Proxy registering pages within Java Proxy Runtime do not sufficiently encode input parameters, resulting in a reflected cross-site scripting (XSS) issue. A reflected XSS attack can be used to non-permanently deface or modify displayed content from a website.

Reflected XSS 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