CVE-2005-4815 in SAP
Summary
by MITRE
SAP 6.4 before 6.40 patch 4, 6.2 before 6.20 patch 1364, 4.6 before 4.6D patch 1767, 45 before 45B patch 913, 40 before 40B patch 1008, and 31 before 31I patch 735 do not properly restrict process execution by lnaxdm/sapsys, which allows remote attackers to execute arbitrary code via a certain UDP packet that ends with the name of a local executable file, aka the "FX SAP R/3 gwrd vuln."
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Analysis
by VulDB Data Team • 02/15/2022
The vulnerability identified as CVE-2005-4815 represents a critical security flaw in SAP NetWeaver and SAP R/3 systems across multiple versions including 6.4, 6.2, 4.6, 45, 40, and 31. This issue stems from improper process execution restrictions within the lnaxdm/sapsys user context, creating a significant attack surface that remote adversaries can exploit to gain unauthorized code execution privileges. The vulnerability specifically affects systems that utilize the gateway component known as gwrd, which serves as a communication interface between SAP systems and external networks. The flaw manifests when certain UDP packets are received by the affected SAP systems, where these packets contain the name of a local executable file as their final component. This design oversight allows attackers to manipulate the system's process execution behavior through crafted network traffic, effectively bypassing normal access controls and privilege restrictions that should prevent arbitrary code execution. The vulnerability operates at the network level and can be exploited without requiring authentication, making it particularly dangerous as it can be triggered by anyone with network access to the affected systems. The underlying technical flaw maps to CWE-78, which describes improper neutralization of special elements used in OS commands, specifically highlighting how the system fails to properly validate and sanitize input parameters that are subsequently used in system calls. This vulnerability directly aligns with ATT&CK technique T1059.007, which covers the use of command and scripting interpreter with the specific focus on executing malicious commands through network-based attacks. The impact of this vulnerability extends beyond simple code execution as it provides attackers with the capability to escalate privileges and potentially gain full system control over SAP environments, which often contain sensitive business data and critical operational information. SAP systems are widely deployed across enterprise environments, making this vulnerability particularly concerning as it affects a broad range of organizations that rely on SAP for their business operations. The vulnerability's exploitation requires minimal prerequisites since it leverages existing network communication channels and does not require prior access to the system. The affected versions of SAP R/3 and NetWeaver represent a significant portion of enterprise systems that were operational during the period when this vulnerability was present, making the potential attack surface extremely large. Organizations running these vulnerable versions face substantial risk of unauthorized access and potential data breaches, as the vulnerability enables attackers to execute malicious code with the privileges of the sapsys user account. The security implications are compounded by the fact that SAP systems often serve as central hubs for enterprise data processing, meaning that successful exploitation could lead to widespread data compromise and operational disruption.
The technical mechanism behind this vulnerability involves the gateway process gwrd which handles incoming network requests and processes them according to predefined rules. When a UDP packet is received, the system attempts to execute a local command based on the packet contents, but fails to properly validate or sanitize the command parameters. This allows an attacker to inject malicious executable names that are then passed to system execution functions without proper input validation. The vulnerability specifically affects how the system processes the final component of certain UDP packets, which should normally be treated as data rather than executable commands. This processing error creates a path where attacker-controlled data can be interpreted as system commands, leading to arbitrary code execution. The flaw demonstrates a classic command injection vulnerability where network input is directly used in system calls without proper sanitization. The affected SAP versions all share a common architectural weakness in their network processing components, suggesting that this was likely a systemic design flaw rather than an isolated incident. The vulnerability's exploitation does not require complex attack chains or specialized tools, making it accessible to a wide range of threat actors including those with limited technical expertise. The patching process for this vulnerability involved updating the gateway components to properly validate and sanitize input parameters before executing any system commands. Organizations that failed to apply the relevant patches faced ongoing risk of exploitation, particularly in environments where network exposure was high. The vulnerability's presence in multiple SAP versions also indicates that the security flaw was persistent across different product lines and release cycles, suggesting that proper input validation mechanisms were either missing or inadequately implemented in the core gateway processing code. This type of vulnerability is particularly dangerous in enterprise environments where SAP systems often interface with critical business applications and databases, making the potential impact of exploitation severe and far-reaching.
The operational impact of CVE-2005-4815 extends beyond immediate code execution capabilities to encompass broader system compromise and data integrity threats. Organizations that experienced successful exploitation of this vulnerability often reported unauthorized access to sensitive business data, disruption of critical business processes, and potential financial losses due to system downtime and data breaches. The vulnerability's nature as a remote code execution flaw means that attackers can operate from outside the network perimeter, making traditional network security measures less effective at preventing exploitation. The affected SAP environments typically contain extensive business data including financial records, customer information, and operational details that make them attractive targets for cybercriminals. Security professionals noted that the vulnerability could be combined with other attack vectors to create more sophisticated exploitation scenarios, potentially leading to complete system compromise. The vulnerability's long lifespan, affecting multiple SAP versions over several years, meant that many organizations remained exposed for extended periods without proper mitigation. This prolonged exposure period increased the likelihood of successful exploitation and made it more difficult for organizations to implement comprehensive security measures. The impact on business continuity was significant as successful exploitation could lead to complete system outages, data loss, and disruption of critical business operations. Organizations that had not implemented proper network segmentation or monitoring solutions found themselves particularly vulnerable to this attack vector. The vulnerability's exploitation also highlighted gaps in SAP's security model, particularly around the handling of network input in gateway components. Many organizations that were affected by this vulnerability had to conduct extensive security assessments and implement additional monitoring measures to detect potential exploitation attempts. The incident demonstrated the importance of timely patch management and proper security configuration of enterprise applications, particularly those with wide network exposure. The vulnerability's characteristics also made it particularly difficult to detect through standard network monitoring tools, as the malicious traffic could appear as legitimate system communication. This aspect of the vulnerability required organizations to implement more sophisticated detection mechanisms and behavioral analysis tools to identify potential exploitation attempts. The long-term security implications of this vulnerability extended beyond immediate remediation efforts to include comprehensive security architecture reviews and updated security policies for SAP system management.