Advisory

On 12.01.2021 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within Java.

SAP Note 2993032 addresses "[CVE-2021-21469] Information Disclosure in SAP NetWeaver Master Data Management" to prevent information disclosure with a medium risk for exploitation.

A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as part of maintenance, the team suggests.

Information disclosure is when an application fails to properly protect sensitive and confidential information from parties that are not supposed to have access to the subject matter in normal circumstances.
Carefully review every information disclosure vulnerablity in regards to disclosure obligations post-GDPR for ‘Personal data’ under the Data Protection Act 2018.

Risk specification

An unauthenticated attacker could modify custom paths within the mds server configuration. This could lead to a information disclosure of highly sensitive data.

Solution

The service will no longer accept remote mds.ini parameter modification unless explicitly allowed in the mds.ini file. More precisely MS Windwows based mds servers will not accept remotely set path parameters using UNC. Circumstances exist that prevent the timely installation of a patch provided by the manufacturer. In such cases, you may consider applying the suggested workaround as a temporary or compensating mitigation: "Restrict access to database administration level - e.g. open ports - as far as possible.".

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

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.

SecurityBridge^{for SAP©}
empowers security teams with forward-looking, high fidelity, adversary-focused intelligence and actionable events from SAP Netweaver based systems.

Follow @_securitybridge

Notifications

Affected system Java

CVSS 5.3

Component MDM-FN-MDS-SEC

Patch Day2021-01

Released on2021/01/12

SAP Note 2993032

Workaround Yes

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
5.3

_Component
MDM-FN-MDS-SEC

_{Patch Day}
2021-01

_{Released
on}
2021/01/12

_{SAP Note}
2993032

_Workaround
Yes