CVE-2001-0836 in Application Server Web Cache
Summary
by MITRE
Buffer overflow in Oracle9iAS Web Cache 2.0.0.1 allows remote attackers to execute arbitrary code via a long HTTP GET request.
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Analysis
by VulDB Data Team • 10/04/2025
The vulnerability identified as CVE-2001-0836 represents a critical buffer overflow flaw within Oracle9iAS Web Cache version 2.0.0.1 that exposes remote attackers to potential code execution capabilities. This issue stems from inadequate input validation mechanisms within the web caching component of Oracle's application server suite, specifically when processing HTTP GET requests that exceed predetermined buffer limits. The flaw manifests when the application fails to properly bounds-check incoming request data, allowing maliciously crafted requests to overwrite adjacent memory locations and potentially hijack program execution flow.
This buffer overflow vulnerability operates under the common weakness enumeration CWE-121, which categorizes buffer overflow conditions as critical security flaws that can lead to arbitrary code execution. The attack vector leverages the HTTP protocol's GET method, where attackers can construct specially formatted requests containing excessive data payloads that exceed the allocated buffer space. When the web cache processes these oversized requests, the overflow corrupts memory structures including return addresses and function pointers, creating opportunities for attackers to inject and execute malicious code within the target system's memory space.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it provides attackers with the capability to achieve complete system compromise. Successful exploitation could result in unauthorized access to sensitive data, privilege escalation to administrative levels, and potential lateral movement within network environments where Oracle9iAS Web Cache is deployed. The remote nature of the attack means that adversaries need not have physical access to the target system, making this vulnerability particularly dangerous for publicly accessible web applications that utilize Oracle's caching infrastructure.
Mitigation strategies for CVE-2001-0836 should prioritize immediate patch deployment from Oracle, as the vendor likely released security updates addressing the specific buffer overflow condition. Network segmentation and perimeter controls should be implemented to limit exposure of vulnerable systems to untrusted networks, while implementing web application firewalls can help detect and block malicious GET requests containing oversized payloads. Additionally, input validation controls should be strengthened at multiple layers of the application architecture, and regular security assessments should verify that no other components within the Oracle9iAS environment contain similar buffer overflow vulnerabilities. The ATT&CK framework categorizes this vulnerability under the technique of code injection, specifically targeting the execution of arbitrary code through memory corruption vulnerabilities that align with the broader category of privilege escalation and persistence mechanisms.