CVE-2006-5784 in Web Application Server
Summary
by MITRE
Unspecified vulnerability in enserver.exe in SAP Web Application Server 6.40 before patch 136 and 7.00 before patch 66 allows remote attackers to read arbitrary files via crafted data on a "3200+SYSNR" TCP port, as demonstrated by port 3201. NOTE: this issue can be leveraged by local users to access a named pipe as the SAPServiceJ2E user.
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Analysis
by VulDB Data Team • 04/26/2026
The vulnerability identified as CVE-2006-5784 represents a critical security flaw in SAP Web Application Server versions 6.40 prior to patch 136 and 7.00 prior to patch 66. This vulnerability exists within the enserver.exe component which serves as the core application server process responsible for handling various network communications and system operations. The flaw manifests through improper input validation mechanisms that fail to adequately sanitize data received through specific TCP port communications, creating an exploitable condition that can be leveraged by malicious actors to gain unauthorized access to system resources.
The technical exploitation of this vulnerability occurs through crafted data transmission on the "3200+SYSNR" TCP port range, with port 3201 specifically mentioned as a demonstration vector. Attackers can construct malicious payloads that bypass normal access controls and authorization mechanisms, allowing them to read arbitrary files from the system. This represents a classic path traversal or arbitrary file read vulnerability where the application fails to properly validate file paths or data inputs, enabling attackers to navigate beyond intended system boundaries and access sensitive files that should remain protected. The vulnerability operates at the application layer and can be executed remotely, making it particularly dangerous as it does not require physical access to the system.
The operational impact of this vulnerability extends beyond simple remote code execution to include significant privilege escalation capabilities. Local users can leverage this vulnerability to access named pipes as the SAPServiceJ2E user account, which typically operates with elevated privileges within the SAP environment. This privilege escalation capability transforms a remote file read vulnerability into a more severe compromise that can potentially allow attackers to execute commands with higher system privileges, access sensitive data, or manipulate the SAP application server configuration. The SAPServiceJ2E user account often possesses critical system permissions that can be leveraged to gain deeper access to enterprise resources.
This vulnerability aligns with CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and CWE-73 (External Control of File Name or Path) categories, representing fundamental flaws in input validation and path handling mechanisms. The attack pattern follows techniques described in the MITRE ATT&CK framework under T1059 (Command and Scripting Interpreter) and T1078 (Valid Accounts) as attackers can use this vulnerability to escalate privileges and maintain persistent access. The vulnerability demonstrates poor security practices in application design where input validation occurs at inappropriate layers or is insufficient to prevent malicious data from being processed. Organizations using SAP Web Application Server versions affected by this vulnerability face significant risk of data breaches, system compromise, and potential regulatory violations due to unauthorized access to sensitive enterprise data.
The recommended mitigation strategy involves applying the appropriate security patches released by SAP for both the 6.40 and 7.00 versions of the Web Application Server. Organizations should also implement network segmentation to restrict access to the affected TCP ports, particularly port 3201, and consider implementing additional monitoring to detect unusual file access patterns or data exfiltration attempts. Network access controls should be configured to limit who can connect to the SAP application server ports, and regular security assessments should be conducted to identify similar vulnerabilities in other components of the SAP ecosystem. Additionally, implementing proper input validation mechanisms and conducting thorough code reviews can help prevent similar issues from occurring in future development cycles.