CVE-2006-2022 in Fenice
Summary
by MITRE
Buffer overflow in the parse_url function in the RTSP module (rtsp/parse_url.c) in Fenice 1.10 and earlier allows remote attackers to execute arbitrary code via a long URL.
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Analysis
by VulDB Data Team • 02/18/2025
The vulnerability identified as CVE-2006-2022 represents a critical buffer overflow flaw within the Fenice media streaming application version 1.10 and earlier. This issue resides in the RTSP module's parse_url function located in the rtsp/parse_url.c source file, where inadequate input validation permits malicious actors to exploit memory corruption through crafted long URL inputs. The buffer overflow vulnerability occurs when the application fails to properly bounds-check user-supplied URL data before processing it, creating an opportunity for attackers to overwrite adjacent memory locations with malicious code. This flaw specifically affects the Real-Time Streaming Protocol implementation within Fenice, which is commonly used for controlling multimedia streaming servers. The vulnerability operates at the application layer and can be exploited remotely without authentication requirements, making it particularly dangerous for networked media servers. According to CWE classification, this represents a classic buffer overflow vulnerability categorized under CWE-121, which deals with stack-based buffer overflow conditions. The ATT&CK framework would classify this under T1190 - Exploit Public-Facing Application, as it targets a publicly accessible streaming protocol implementation. The operational impact of this vulnerability extends beyond simple code execution, as successful exploitation can result in complete system compromise, allowing attackers to gain unauthorized access, execute arbitrary commands, and potentially establish persistent backdoors within the affected media server infrastructure. The vulnerability's severity is amplified by the widespread use of RTSP protocol in multimedia applications and the fact that it can be triggered through simple URL manipulation without requiring complex attack vectors.
The technical exploitation of this buffer overflow requires careful crafting of a URL string that exceeds the allocated buffer size within the parse_url function. When the application processes this oversized input, it overflows the stack buffer and potentially corrupts return addresses or other critical memory structures. Attackers can leverage this vulnerability by constructing a malicious URL that includes excessive data, causing the application to overwrite memory in a controlled manner. The specific memory layout and stack organization of the Fenice application determine the precise exploitation technique, but typical approaches involve overwriting function pointers or return addresses to redirect execution flow. The vulnerability's impact is particularly severe because RTSP servers are often deployed in networked environments where they are accessible to unauthenticated users, making the attack surface wide and accessible. Security researchers have noted that the lack of proper input sanitization and bounds checking in the URL parsing routine creates a predictable exploitation pattern. The vulnerability's exploitation can lead to privilege escalation if the media server process runs with elevated permissions, and may also enable attackers to perform reconnaissance activities or deploy additional malware within the compromised network infrastructure.
Mitigation strategies for CVE-2006-2022 focus primarily on immediate remediation through software updates and patches provided by the vendor. Organizations should prioritize upgrading to Fenice versions that contain fixed implementations of the parse_url function with proper bounds checking and input validation mechanisms. The patch implementation should include robust buffer management practices such as using safe string handling functions, implementing proper input length validation, and employing stack canaries or other memory protection mechanisms. Network-level mitigations include implementing firewall rules that restrict access to RTSP ports and services, as well as deploying intrusion detection systems that can identify suspicious URL patterns. Security administrators should also consider implementing application-level restrictions that limit the maximum URL length accepted by RTSP services. According to industry best practices and the NIST cybersecurity framework, organizations should conduct thorough vulnerability assessments to identify all instances of the affected Fenice versions within their infrastructure. The remediation process should include not only patching but also network segmentation to limit exposure of RTSP services to trusted internal networks only. Additionally, organizations should implement monitoring solutions that can detect anomalous URL patterns or excessive data transfers that might indicate exploitation attempts. Regular security audits and penetration testing should be conducted to ensure that similar buffer overflow vulnerabilities are not present in other components of the media streaming infrastructure, as the same coding patterns that led to this vulnerability may exist elsewhere in the application codebase.