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SAP JAVA NetWeaver System Connections XML Injection

SAP JAVA NetWeaver System Connections XML Injection
Posted Oct 22, 2021
Authored by Pablo Artuso | Site onapsis.com

The Communication Profiles functionality provided within SAP JAVA NetWeaver suffers from an XML external entity injection vulnerability.

tags | advisory, java
advisories | CVE-2021-27635
SHA-256 | 148727acfbb4a8a75ea11ebaf68ed2fcc427fa652ac0cb1a7e2f15ae72c6fc66

SAP JAVA NetWeaver System Connections XML Injection

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# Onapsis Security Advisory 2021-0016: XXE in SAP JAVA NetWeaver System

## Impact on Business

A high-privileged SAP JAVA NetWeaver user is able to abuse an XXE
with the goal of reading files from the OS (compromising confidentiality)
making system processes crash (compromising availability).

## Advisory Information

- Public Release Date: 11/22/2021
- Security Advisory ID: ONAPSIS-2021-0016
- Researcher(s): Pablo Artuso

## Vulnerability Information

- Vendor: SAP
- Affected Components:
- ESP framework (SAP JAVA)

(Check SAP Note 3053066 for detailed information on affected releases)

- Vulnerability Class: CWE-611: Improper Restriction of XML External Entity
- CVSS v3 score: 8.7 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:H)
- Risk Level: High
- Assigned CVE: CVE-2021-27635
- Vendor patch Information: SAP Security NOTE 3053066

## Affected Components Description

The ESP framework is a framework used inside SAP JAVA NetWeaver. Due to
part of this foundational layer, every SAP product based on JAVA NetWeaver
be vulnerable to this attack. This includes: SAP SolMan, SAP LaMa, SAP CRM,
just to mention a few.

## Vulnerability Details

The Communication Profiles functionality provided within SAP JAVA
NetWeaver, is
vulnerable to XXE attacks. Due to the lack of validation of external
an authenticated attacker is able to submit specially crafted XML and
the integrity (by reading files of the OS) and the availability (by causing
to crash).

## Solution

SAP has released SAP Note 3053066 which provide patched versions of the
affected components.

The patches can be downloaded from

Onapsis strongly recommends SAP customers to download the related
security fixes and apply them to the affected components in order to
reduce business risks.

## Report Timeline

- 04/22/2021 - Onapsis sends details to SAP
- 04/23/2021 - SAP provides internal tracking ID 2170134834
- 04/26/2021 - SAP provides the following email:
- 05/10/2021 - SAP provides update: Vulnerability being fixed
- 06/08/2021 - SAP releases patch #3053066
- 11/22/2021 - Advisory published

## References

- Onapsis blogpost: https://onapsis.com/de/node/3651
- CVE Mitre: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27635
- Vendor Patch: https://launchpad.support.sap.com/#/notes/3053066

## About Onapsis Research Labs

Onapsis Research Labs provides the industry analysis of key security
issues that impact business-critical systems and applications.
Delivering frequent and timely security and compliance advisories with
associated risk levels, Onapsis Research Labs combine in-depth knowledge
and experience to deliver technical and business-context with sound
security judgment to the broader information security community.

Find all reported vulnerabilities at

## About Onapsis, Inc.

Onapsis protects the mission-critical applications that run the global
from the core to the cloud. The Onapsis Platform uniquely delivers
insight, secure change, automated governance and continuous monitoring for
systems—ERP, CRM, PLM, HCM, SCM and BI applications—from leading vendors
such as SAP,
Oracle, Salesforce and others, while keeping them protected and compliant.

For more information, connect with us on Twitter or LinkedIn, or visit us at

## License
This advisory is licensed under a [Creative Commons 4.0 BY-ND International
<br><br><img src="../../images/license_cc.png" align="left" height="36"
width="112" >

This email and any files transmitted with it are confidential and intended
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If you have received this email in error please notify the system manager.
This message contains confidential information and is intended only for the
individual named. If you are not the named addressee you should not
disseminate, distribute or copy this e-mail.
Please notify the sender
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delete this e-mail from your system. If you are not the intended recipient
you are notified that disclosing, copying, distributing or taking any
action in reliance on the contents of this information is strictly

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