CVE-2002-1641 in Application Server Web Cache
Summary
by MITRE
Multiple buffer overflows in Oracle Web Cache for Oracle 9i Application Server (9iAS) allow remote attackers to execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 09/03/2025
Oracle Web Cache component within Oracle 9i Application Server presents a critical security vulnerability through multiple buffer overflow conditions that can be exploited remotely to achieve arbitrary code execution. These buffer overflows occur in the web cache implementation and represent a fundamental flaw in input validation and memory management practices within the application server framework. The vulnerability affects versions of Oracle 9i Application Server where the Web Cache module handles incoming requests, making it a prime target for attackers seeking to compromise web application environments. The unknown vectors referenced in the CVE description suggest that the specific triggering conditions may not have been fully documented at the time of disclosure, which compounds the severity by making defensive measures more challenging to implement. This vulnerability type directly maps to CWE-121, which describes buffer overflow conditions where insufficient boundary checking allows attackers to overwrite adjacent memory locations. The attack surface extends beyond simple code execution to potentially enable full system compromise when attackers can leverage these overflows to gain elevated privileges or manipulate application behavior.
The technical exploitation of these buffer overflows in Oracle Web Cache enables attackers to manipulate memory layout and potentially inject malicious code into the running application process. The remote nature of the attack means that adversaries do not require physical access to the target system and can exploit the vulnerability from anywhere on the network. This characteristic aligns with ATT&CK technique T1203, which involves exploiting weaknesses in remote services to gain unauthorized access. The buffer overflow conditions likely occur when processing malformed HTTP requests or cache-related parameters that exceed allocated memory boundaries. When these overflows occur, they can overwrite critical program execution structures such as return addresses, function pointers, or stack-based variables, allowing attackers to redirect program flow and execute malicious instructions. The vulnerability's impact extends to the entire Oracle 9i Application Server environment, potentially affecting multiple applications hosted within the same server instance, making it particularly dangerous for organizations with multiple web applications relying on the same infrastructure.
Organizations running affected Oracle 9i Application Server installations face significant operational risks when these buffer overflows remain unpatched, as they provide attackers with a straightforward path to system compromise. The vulnerability can be exploited to gain unauthorized access to sensitive data, manipulate application content, or establish persistent backdoors within the target environment. The remote exploit capability means that organizations must consider the entire network perimeter as potentially compromised, requiring immediate remediation efforts and network monitoring for signs of exploitation attempts. System administrators should implement comprehensive network segmentation and access controls to limit the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of proper input validation and memory management practices within enterprise web applications, as these buffer overflows represent a classic example of insecure coding practices that can be prevented through adherence to secure development principles. Organizations should conduct immediate vulnerability assessments to identify all instances of the affected Oracle 9i Application Server components and prioritize patch deployment across their infrastructure.
Mitigation strategies for CVE-2002-1641 should include immediate patch application from Oracle, which would address the underlying buffer overflow conditions in the Web Cache implementation. Network-based mitigations such as firewall rules and intrusion detection system signatures can provide additional protection while patches are being deployed, particularly for restricting access to the affected web cache services. The implementation of web application firewalls and input validation controls can help detect and prevent malformed requests that might trigger the buffer overflow conditions. Organizations should also consider disabling unnecessary web cache functionality and implementing proper access controls to limit exposure to potential attackers. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other components of the Oracle 9i Application Server and prevent future occurrences of this class of vulnerability. The remediation process must include thorough testing of patches to ensure that they do not introduce compatibility issues with existing applications while maintaining the security improvements necessary to address the buffer overflow conditions.