Advisory

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

SAP Note 3078072 addresses "[CVE-2021-33704] Missing Authorization Check in SAP Business One (Service Layer)" to prevent missing authorization check 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.

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

The Service Layer of SAP Business One allows an authenticated attacker to invoke certain functions that would otherwise be restricted to specific users.

Solution

The affected functions have now been enforced to properly check access restrictions.

The advisory is valid for

B1_ON_HANA 10.0 ¹⁹
SAP-M-BO 10.0 ²¹

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 - Code vulnerabilty analysis

Secure code
Customer created code contains security risks. Use modern technologies to detect coding flaws mitigate unneccessary risks. Start to detect:

Open & Native SQL Injection
Potential backdoors
Insuffient authorization checks of user administration bypassed
Injections of operating system commands
and many more..

Start scanning for ABAP Code vulnerabilities

Follow @_securitybridge

Notifications

Affected system SAP Business One

CVSS 6.3

Component SBO-CRO-SEC

Patch Day2021-08

Released on2021/08/10

SAP Note 3078072

Workaround No

Advisory

Risk specification

Solution

Disclaimer

_{Affected system}
SAP Business One

_CVSS
6.3

_Component
SBO-CRO-SEC

_{Patch Day}
2021-08

_{Released
on}
2021/08/10

_{SAP Note}
3078072

_Workaround
No