CVE-2009-1011 in Application Server
Summary
by MITRE
Unspecified vulnerability in the Outside In Technology component in Oracle Application Server 8.2.2 and 8.3.0 allows local users to affect confidentiality, integrity, and availability, related to HTML. NOTE: the previous information was obtained from the April 2009 CPU. Oracle has not commented on reliable researcher claims that this issue is for multiple integer overflows in a function that parses an optional data stream within a Microsoft Office file, leading to a heap-based buffer overflow.
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Analysis
by VulDB Data Team • 12/10/2017
The vulnerability identified as CVE-2009-1011 represents a critical security flaw within Oracle Application Server's Outside In Technology component affecting versions 8.2.2 and 8.3.0. This issue stems from improper handling of HTML content processing within the application server environment, creating potential attack vectors that could compromise system integrity and data security. The vulnerability's classification as unspecified initially masked its true nature, which was later revealed through researcher analysis to involve multiple integer overflows occurring during the parsing of optional data streams within Microsoft Office files. These integer overflows specifically manifest within a parsing function that processes Microsoft Office file structures, creating conditions where memory corruption can occur through heap-based buffer overflow mechanisms. The technical implementation flaw occurs when the Outside In Technology component attempts to process malformed or specially crafted Office documents, leading to arithmetic overflow conditions that result in memory layout corruption. This vulnerability operates at the intersection of file format parsing and memory management, where the component fails to properly validate input parameters during the processing of optional data streams, creating opportunities for attackers to manipulate memory structures. The security implications extend across all three fundamental principles of information security as outlined in the CIA triad, enabling attackers to potentially compromise confidentiality through data exposure, integrity through data manipulation, and availability through system disruption or denial of service conditions.
The operational impact of this vulnerability extends beyond simple local privilege escalation scenarios, as the heap-based buffer overflow conditions can be exploited to execute arbitrary code within the context of the Oracle Application Server process. Attackers leveraging this vulnerability can potentially gain unauthorized access to sensitive data, modify system configurations, or cause service interruptions that could affect business operations. The vulnerability's presence in Oracle Application Server versions 8.2.2 and 8.3.0 creates widespread exposure across organizations that have not yet migrated to supported versions, as these legacy systems continue to process Office documents through the Outside In Technology component. The integer overflow conditions specifically relate to the parsing of optional data streams within Microsoft Office file formats, making this vulnerability particularly dangerous in environments where users regularly process documents from untrusted sources. The heap-based nature of the buffer overflow means that attackers can potentially overwrite critical memory locations including return addresses, function pointers, or other control data structures that govern program execution flow. This type of vulnerability aligns with CWE-129, which addresses insufficient validation of length of input buffers, and CWE-190, which covers integer overflow conditions that can lead to buffer overflows. The attack surface is further expanded by the fact that this vulnerability exists within a component designed to process various file formats, making it a potential vector for exploitation through multiple attack pathways.
Mitigation strategies for CVE-2009-1011 should focus on immediate remediation through Oracle's security patches and updates, as well as implementing defensive measures to reduce exposure. Organizations should prioritize upgrading to supported Oracle Application Server versions that contain fixes for this vulnerability, as the affected versions are no longer maintained with security updates. Network segmentation and access controls should be implemented to limit the exposure of systems running vulnerable versions, particularly those processing Office documents from external sources. The implementation of input validation measures and content filtering can help reduce the risk of exploitation by preventing malformed Office documents from reaching the vulnerable parsing components. Security monitoring should be enhanced to detect potential exploitation attempts through unusual memory access patterns or process behavior changes that might indicate buffer overflow exploitation. Additionally, organizations should consider implementing application whitelisting policies to restrict the execution of Office processing components to trusted applications only. The vulnerability's characteristics align with ATT&CK technique T1203, which covers Exploitation for Client Execution, and T1059, which covers Command and Scripting Interpreter, as attackers may leverage this vulnerability to execute malicious code within the application server environment. Regular security assessments and penetration testing should be conducted to verify that the implemented mitigations are effective against potential exploitation attempts targeting this specific vulnerability.