CVE-2009-0993 in Application Server 10g
Summary
by MITRE
Unspecified vulnerability in the OPMN component in Oracle Application Server 10.1.2.3 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors. NOTE: the previous information was obtained from the April 2009 CPU. Oracle has not commented on reliable researcher claims that this issue is a format string vulnerability that allows remote attackers to execute arbitrary code via format string specifiers in an HTTP POST URI, which are not properly handled when logging to opmn/logs/opmn.log.
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Analysis
by VulDB Data Team • 09/01/2019
The vulnerability identified as CVE-2009-0993 resides within the OPMN (Oracle Process Manager and Notification) component of Oracle Application Server version 10.1.2.3, representing a critical security weakness that affects the confidentiality, integrity, and availability of affected systems. This unspecified vulnerability was initially documented in Oracle's April 2009 Critical Patch Update, though subsequent research revealed more specific details about its nature and exploitation potential. The OPMN component serves as a crucial process management and notification system within Oracle's application server architecture, making its compromise particularly dangerous for enterprise environments relying on Oracle Application Server infrastructure.
Technical analysis reveals that this vulnerability manifests as a format string vulnerability within the HTTP POST URI handling mechanism of the OPMN component. When processing HTTP POST requests containing format string specifiers in the URI, the system fails to properly sanitize or validate these inputs before logging them to the opmn/logs/opmn.log file. This improper handling creates a classic format string vulnerability where attacker-controlled data can be interpreted as format specifiers, potentially leading to arbitrary code execution. The vulnerability stems from the insecure use of user-supplied input in logging functions without proper input validation or sanitization, aligning with CWE-134 which specifically addresses format string vulnerabilities.
The operational impact of this vulnerability extends beyond simple data compromise, as it provides attackers with a potential path to complete system control through remote code execution capabilities. Attackers can craft malicious HTTP POST requests containing specially formatted strings that, when processed by the vulnerable OPMN component, can lead to arbitrary code execution on the target system. This capability enables unauthorized access to sensitive data, system manipulation, and potential lateral movement within network environments. The vulnerability affects the availability of services as successful exploitation can lead to system crashes or denial of service conditions. According to ATT&CK framework, this represents a privilege escalation and execution technique, specifically targeting the application layer through input validation flaws.
Mitigation strategies for CVE-2009-0993 should prioritize immediate patching of Oracle Application Server to the latest available versions that address this specific format string vulnerability. Organizations should implement network segmentation to limit access to Oracle Application Server components and deploy intrusion detection systems to monitor for suspicious HTTP POST requests containing unusual format string patterns. Input validation should be strengthened at all application entry points, particularly in URI handling components, and proper logging practices should be implemented to prevent format string specifiers from being processed in sensitive contexts. Security monitoring should include regular inspection of opmn.log files for anomalous entries that might indicate exploitation attempts, while also implementing application firewalls that can detect and block malformed HTTP requests targeting known vulnerable patterns.