CVE-2025-31330 Overview
SAP Landscape Transformation (SLT) contains a critical code injection vulnerability that allows an attacker with user privileges to exploit a flaw in a function module exposed via RFC (Remote Function Call). This vulnerability enables the injection of arbitrary ABAP code into the system, bypassing essential authorization checks. The flaw effectively functions as a backdoor, creating the risk of full system compromise and undermining the confidentiality, integrity, and availability of the system.
Critical Impact
This vulnerability allows authenticated attackers to inject and execute arbitrary ABAP code, potentially leading to complete system takeover and data exfiltration in SAP environments.
Affected Products
- SAP Landscape Transformation (SLT)
- SAP systems with RFC-exposed function modules for SLT
- SAP NetWeaver environments utilizing SLT components
Discovery Timeline
- April 8, 2025 - CVE-2025-31330 published to NVD
- April 8, 2025 - Last updated in NVD database
Technical Details for CVE-2025-31330
Vulnerability Analysis
This vulnerability is classified as CWE-94 (Improper Control of Generation of Code), commonly known as Code Injection. The flaw resides in the SAP Landscape Transformation (SLT) module, specifically within function modules exposed via RFC interfaces. The vulnerability allows authenticated users to bypass authorization checks and inject arbitrary ABAP code into the system.
The attack can be executed remotely over the network by any user with basic privileges, requiring no user interaction. The scope is changed, meaning the vulnerability can impact resources beyond the vulnerable component itself, potentially affecting the entire SAP landscape.
Root Cause
The root cause stems from improper input validation and insufficient authorization checks within the RFC-exposed function module in SAP Landscape Transformation. The function module fails to properly sanitize user-supplied input before processing, allowing attackers to inject ABAP code that gets executed with elevated privileges. This design flaw essentially creates a backdoor that circumvents the normal security controls expected in SAP environments.
Attack Vector
The attack is executed over the network through the RFC interface. An attacker with valid user credentials can craft malicious requests to the vulnerable function module, embedding ABAP code within the input parameters. Since the function module lacks proper authorization checks and input validation, the injected code is executed on the SAP system. This allows attackers to:
- Execute arbitrary ABAP commands with system privileges
- Access, modify, or delete sensitive business data
- Create backdoor accounts for persistent access
- Pivot to other connected SAP systems within the landscape
The vulnerability mechanism involves crafting RFC calls to the affected function module with malicious ABAP code embedded in input parameters. The lack of proper input sanitization allows this code to be interpreted and executed by the SAP system. For detailed technical information, refer to SAP Note #3587115.
Detection Methods for CVE-2025-31330
Indicators of Compromise
- Unusual RFC calls to SLT-related function modules from unexpected user accounts or external systems
- Unexpected ABAP program executions or dynamic code generation events in SAP system logs
- Anomalous user privilege escalations or unauthorized data access patterns
- New or modified ABAP programs that were not part of authorized development activities
Detection Strategies
- Monitor SAP Security Audit Log (SM21) for suspicious RFC function calls targeting SLT modules
- Implement SAP Solution Manager for centralized monitoring of RFC activity across the landscape
- Deploy SIEM integration with SAP to correlate RFC events with known attack patterns
- Review transaction SM37 for batch jobs executing dynamic ABAP code unexpectedly
Monitoring Recommendations
- Enable detailed RFC logging and regularly review logs for anomalous patterns
- Implement real-time alerting for RFC calls to sensitive function modules from non-whitelisted sources
- Establish baseline behavior for SLT operations and alert on deviations
- Conduct regular code reviews of custom ABAP developments that interface with SLT
How to Mitigate CVE-2025-31330
Immediate Actions Required
- Apply the security patch documented in SAP Note #3587115 immediately
- Review and restrict RFC access to SLT function modules to only authorized users and systems
- Audit current user authorizations and remove unnecessary privileges from non-essential accounts
- Enable enhanced logging for RFC activities to detect potential exploitation attempts
Patch Information
SAP has released a security patch to address this vulnerability. Administrators should obtain and apply the fix from SAP Note #3587115. This patch is part of the SAP Security Patch Day releases. Organizations should prioritize deployment given the critical severity and potential for complete system compromise.
Workarounds
- Restrict RFC access to SLT function modules using SM59 destination configurations and authorization objects
- Implement network segmentation to limit RFC connectivity from untrusted networks
- Review and tighten authorization object S_RFC assignments to minimize exposure
- Consider temporarily disabling vulnerable function modules if business operations permit until patching is complete
# SAP authorization review command example
# Review RFC authorizations using transaction SUIM
# 1. Execute transaction SUIM
# 2. Select "Roles by Complex Selection Criteria"
# 3. Filter for authorization object S_RFC
# 4. Review assignments to SLT-related function groups
# 5. Remove unnecessary authorizations from non-essential roles
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
