Advisory

On 12.04.2022 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within Java.

SAP Note 3148377 addresses "[CVE-2022-28217] Missing XML Validation vulnerability in SAP NW EP WPC" to prevent external entity tunneling (xxe) with a medium risk for exploitation.

A workaround does not exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance, the team suggests.

Risk specification

Some part of SAP NetWeaver (EP Web Page Composer) does not sufficiently validate an XML document accepted from an untrusted source, which allows an adversary to exploit unprotected XML parking at endpoints, and a possibility to conduct SSRF attacks that could compromise system’s availability by causing the system to crash.

Solution

The EP Web Page Composer of SAP NetWeaver is updated to properly validate XML documents.

Affected System

SAP Netweaver Application Server Java is part of the SAP NetWeaver Application Platform. It provides the complete infrastructure for deploying and running Java applications.

The AS Java Home: SAP Netweaver Application Server Java wiki
A dedicated SAP NetWeaver 7.40 Application Server for Java Security Guide exists.

The advisory is valid for

EP-WPC 7.20
EP-WPC 7.30 ²
EP-WPC 7.31 ²
EP-WPC 7.40 ²
EP-WPC 7.50 ²

Releated advisories

Disclaimer

SecurityBridge takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability concerning one of the SAP software products – either in the latest or in a former product version follow the guidelines and processes in accordance with the SAP portal page “Report a Security Vulnerability to SAP”.

The advisories found within the SecurityBridge advisory are generated and continuously enriched by our Team at SecurityBridge and affiliated security consultants, partners, customers of the SecurityBridge Platform, SAP support, and advisory groups.

We do not disclose zero-day vulnerabilities unless a security patch has been made available to the public. In such case, the platform only provides details on which version or signature updates are available within the SecurityBridge platform in order to monitor or measure the vulnerability.

In accordance with SAP guidelines, SecurityBridge only discloses issues where the fixing security note has been released. The vulnerability platform makes no references to available exploits or Proof of Concepts (PoC). Advisories and vulnerabilities will always mention the fixing security note or hints to the corresponding SAP documentation.

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Notifications

Affected system Java

CVSS 6.5

Component EP-PIN-WPC

Patch Day2022-04

Released on2022/04/12

SAP Note 3148377

Workaround No

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
6.5

_Component
EP-PIN-WPC

_{Patch Day}
2022-04

_{Released
on}
2022/04/12

_{SAP Note}
3148377

_Workaround
No