CVE-2007-2703 in WebLogic Portal
Summary
by MITRE
BEA WebLogic Portal 9.2 GA can corrupt a visitor entitlements role if an administrator provides a long role description, which might allow remote authenticated users to access privileged resources.
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Analysis
by VulDB Data Team • 06/14/2025
BEA WebLogic Portal 9.2 GA contains a buffer overflow vulnerability in its role management system that occurs when administrators provide role descriptions exceeding the allocated buffer space. This vulnerability resides in the entitlements processing subsystem where the system fails to properly validate the length of role description fields before storing them in memory. The flaw stems from inadequate input sanitization and boundary checking mechanisms within the portal's administrative interface, creating a condition where excessive data can overwrite adjacent memory regions. According to CWE-121, this represents a classic stack-based buffer overflow vulnerability that can lead to arbitrary code execution or information disclosure. The vulnerability affects the portal's access control mechanisms by corrupting the role membership data structure, potentially allowing authenticated attackers to escalate their privileges and gain access to restricted resources. Attackers can exploit this by creating or modifying roles with excessively long description fields, which then corrupts the memory layout of the entitlements system. The operational impact extends beyond simple privilege escalation as the corrupted memory state can cause unpredictable behavior in the portal's authorization subsystem, potentially leading to denial of service conditions or complete system compromise. The vulnerability is particularly concerning because it requires only authenticated access, making it accessible to users who have legitimate administrative credentials but may not possess elevated privileges. This weakness aligns with ATT&CK technique T1078.004 which covers valid accounts as a means of gaining access, and T1068 which involves exploiting vulnerabilities in legitimate accounts. The memory corruption can manifest in various ways including heap corruption, stack smashing, or data structure overwrites that affect the integrity of the portal's role-based access control policies.
The technical implementation of this vulnerability involves the portal's handling of role description fields during administrative operations such as role creation or modification. When an administrator submits a role with a description longer than 256 characters, the system fails to truncate or reject the input, instead allowing the data to overflow into adjacent memory locations. This overflow can overwrite critical control structures including pointers, flags, or other metadata that govern how the system processes user entitlements. The vulnerability is particularly insidious because it operates silently in the background, corrupting data without immediate system failure or error messages. The corrupted role information can then be used by attackers to bypass access controls, as the system may incorrectly interpret the corrupted data structures when evaluating user permissions. The memory layout of the WebLogic Portal application creates predictable overflow conditions where the excess data overwrites specific variables in the entitlements processing code. This type of vulnerability is classified under CWE-787, which covers out-of-bounds write conditions, and represents a critical weakness in the application's memory management and input validation processes.
Mitigation strategies for this vulnerability require both immediate patching and architectural improvements to prevent similar issues in the future. Organizations should prioritize applying the official security patches provided by BEA/Oracle to address this specific buffer overflow condition. Additionally, implementing strict input validation measures including character limit enforcement for role descriptions and other administrative fields can prevent exploitation attempts. The system should enforce maximum length constraints on all user-supplied data within the administrative interface, with proper error handling for inputs that exceed acceptable limits. Network segmentation and least privilege principles should be implemented to limit the potential damage from successful exploitation attempts, ensuring that even if an attacker gains access to administrative functions, they cannot escalate privileges beyond their intended scope. Security monitoring should include detection of unusual administrative activities, particularly those involving role creation or modification with unusually long description fields. Regular security audits of administrative interfaces should be conducted to identify similar input validation weaknesses. The implementation of automated input sanitization tools and regular code reviews focused on memory management practices can help prevent similar buffer overflow vulnerabilities from being introduced in future development cycles. Organizations should also consider implementing application whitelisting policies and runtime protection mechanisms to detect and prevent exploitation attempts targeting this type of vulnerability.