CVE-2001-0209 in DNSA
Summary
by MITRE
Buffer overflow in Shoutcast Distributed Network Audio Server (DNAS) 1.7.1 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long description.
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Analysis
by VulDB Data Team • 04/07/2019
The vulnerability identified as CVE-2001-0209 represents a critical buffer overflow flaw within the Shoutcast Distributed Network Audio Server version 1.7.1 which operates as a media streaming server for internet radio broadcasting. This particular implementation flaw affects the server's handling of audio stream descriptions, creating a potential attack vector that could be exploited by remote adversaries to compromise system integrity and availability. The vulnerability stems from insufficient input validation mechanisms within the server's processing pipeline for stream metadata, specifically targeting the description field that users can provide when configuring audio streams.
The technical nature of this buffer overflow stems from the server's failure to properly bounds-check user-provided description data before copying it into fixed-length memory buffers. When an attacker submits a description exceeding the allocated buffer size, the excess data overflows into adjacent memory regions, potentially corrupting critical program state information and execution flow control structures. This memory corruption can manifest in various ways including application crashes, abnormal termination, or in more severe cases where the overflowed data can overwrite return addresses and function pointers, enabling potential code execution. The vulnerability specifically targets the server's description handling functionality which is commonly used during stream registration and metadata management processes.
The operational impact of this vulnerability extends beyond simple denial of service conditions to potentially enable remote code execution capabilities that could allow attackers to gain unauthorized control over the affected server. When successfully exploited, attackers could execute arbitrary commands with the privileges of the running server process, potentially leading to complete system compromise and unauthorized access to network resources. The distributed nature of the Shoutcast network means that a compromised server could serve as a foothold for broader network infiltration activities, making this vulnerability particularly dangerous in environments where multiple servers operate within the same network infrastructure. The vulnerability affects not only the immediate server but also potentially impacts the entire distributed audio streaming network that relies on DNAS 1.7.1 implementations.
Mitigation strategies for this vulnerability require immediate patching of the affected software version to address the buffer overflow conditions through proper input validation and bounds checking mechanisms. System administrators should implement network segmentation and access controls to limit exposure of vulnerable servers to untrusted networks while monitoring for suspicious traffic patterns that may indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a classic example of improper input validation that violates security best practices. Organizations should also consider implementing intrusion detection systems and network monitoring tools to identify potential exploitation attempts and maintain comprehensive security logs for forensic analysis. Additionally, the use of modern memory-safe programming practices and runtime protections such as stack canaries and address space layout randomization should be considered as additional layers of defense against similar vulnerabilities in future implementations.
This vulnerability demonstrates the critical importance of input validation and memory safety in network services, particularly those handling user-provided data. The attack surface created by this flaw illustrates how seemingly benign functionality like stream descriptions can become dangerous when insufficiently protected against malicious input. The historical context of this vulnerability highlights the evolution of security practices in network server implementations and underscores the necessity of comprehensive security testing throughout the software development lifecycle. Organizations should conduct regular vulnerability assessments and penetration testing to identify similar buffer overflow conditions in their own systems, while maintaining up-to-date security patches and implementing defense-in-depth strategies to protect against exploitation attempts. The lessons learned from CVE-2001-0209 continue to inform modern security practices and emphasize the fundamental importance of robust input validation and memory management in maintaining secure network infrastructure.