Advisory
SAP takes the security of its vast product portfolio very seriously and thus releases security fixes for
vulnerabilities reported by external researchers and their customers every second Tuesday of the month.
SAP Note 2843016
was released on
12.11.2019 and deals with
"[CVE-2019-0388] Content spoofing vulnerability in UI5 HTTP Handler" within ABAP.
We advice you to follow the instructions, to resolve
content spoofing
with a
medium potential for exploitation
in component CA-UI5-DLV.
According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as monthly patch process.
Missing authority checks are still the most common security defect related to authorizations in custom code. Since SAP uses an explicit authorization model, an authority checks must be coded in order to be executed. If an explicit check is not coded, all users have access. This type of vulnerability not only exists in SAP standard it also exists in customer coding. Check your custom developments for vulnerabilities that pose a risk to your systems. SecurityBridge helps detect code vulnerabilities before they are implemented in production.
Risk specification
This note has been re-released with updated 'Solution’ information. UI5 HTTP Handler allows an attacker to manipulate content due to insufficient URL validation, which would allow an unauthenticated adversary to steal credentials of a unsuspecting user or redirect such users to untrusted webpages containing malware or similar malicious exploits.Solution
As part of the solution, few parameters were deleted, without which the UI page cannot be utilized, and is made to show only static content. Alternativly, the consulting team has proposed the following: "Cross-site scripting/request forgery filter engine on IDS/IPS/firewall systems. ". The suggestion may be considered, as a workaround or compensating mitigation. We recommend installing/applying the correction wherever possible and as soon as possible. Base your decision on whether or not to apply the patch on your companies and systems risk perspective and consider the provided CVSS 4.3 score.
Affected System
The advisory 2843016 describes a problem within an ABAP based systems of a specific version. Affected versions are described below. ABAP software is deployed in various software components and is widely used within the SAP product portfolio.
SAP NetWeaver Application Server (formally known as SAP Web Application Server) is a building block of SAP NetWeaver. It is the foundation for most software products developed by SAP SE. SAP NetWeaver systems exist with Java and/or ABAP stacks. The advisory could be relevant for single and dual-stack ABAP installations.
The advisory is valid for
- SAP_UI 750 18
- SAP_UI 751 4
- SAP_UI 752 8
- SAP_UI 753 18
- SAP_UI 754 26
- UI_700 200 10
