Application: SAP NetWeaver AS Java
Versions Affected: SAP NetWeaver Development Infrastructure Component Build Service versions – 7.11, 7.20, 7.30, 7.31, 7.40, 7.50
Vendor URL: https://sap.com/
Date of Public Advisory: June 1, 2023
SAP Note: 3072955
SAP Approved Fixes: True
Status: analyzed and published
Title: [CVE-2021-33690] Server-Side Request Forgery Vulnerability in SAP NetWeaver Development Infrastructure
Advisory URL: https://redrays.io/cve-2021-33690-server-side-request-forgery-vulnerability/
Date published: June 1, 2023
Remotely Exploitable: Yes
Locally Exploitable: No
CVSS v3.1 Base Score: 9.9 / 10 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
A vulnerability known as Server-Side Request Forgery (SSRF) has been identified in various versions of the SAP NetWeaver Development Infrastructure Component Build Service, namely 7.11, 7.20, 7.30, 7.31, 7.40, and 7.50. This weakness within the SAP NetWeaver Development Infrastructure Component Build Service gives an attacker, who has server access, the ability to execute proxy attacks via specially tailored queries. The aftermath of such attacks can lead to the complete compromise of sensitive server data, affecting its accessibility. It’s crucial to note that the severity of this vulnerability is contingent on whether the SAP NetWeaver Development Infrastructure (NWDI) operates on the intranet or the internet. The CVSS score has been calculated based on the worst-case situation, which presumes it operates online.
To determine if the server is vulnerable to SSRF, send the following request:
POST /tc.CBS.Appl/tcspseudo HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0
Accept: text/html,application/xhtml xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
If the following response is received, it implies the presence of the vulnerability:
Could not connect to the CBS.
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The cornerstone of RedRays’ accomplishments lies in our research and development (R&D) unit, specializes in studying and analyzing vulnerabilities in essential corporate applications. Our R&D initiatives have earned acknowledgment and admiration from leading software firms such as SAP, Oracle, Microsoft Dynamics, and IBM. This dedication to research enables us to anticipate emerging threats and craft bespoke security solutions that cater to our clients’ needs.
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