Hot Note
Affected system
ABAP
CVSS
9.1
Component
BC-UPG-NZ
Patch Day
2021-08
Released on
2021/08/10
SAP Note
3078312
Workaround
Yes
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Advisory

On 10.08.2021 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.

SAP Note 3078312 addresses "[CVE-2021-33701] SQL Injection vulnerability in SAP NZDT Row Count Reconciliation" to prevent sql injection with a hot news risk for exploitation.

A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process, the team suggests.

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

DMIS Mobile Plug-In or SAP S/4HANA allows an attacker with access to the highly privileged account to execute manipulated queries in the NZDT tool to gain access to Backend Database.

Solution

An ASSERT statement will be added directly after the authorization check of function module IUUC_RECON_RC_COUNT_TABLE_BIG that enforces import parameter IT_WHERE_CLAUSE to be empty. If import parameter IT_WHERE_CLAUSE is not empty, the execution of the function module will fail with a short dump.  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: "As a workaround for systems with software component version SAP_BASIS 740 or higher and active Unified Connectivity (UCON) runtime checks, the following steps described in the note.".

Affected System

The advisory 3078312 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

 

 

Disclaimer

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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.

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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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