CVE-2004-2129 in Surfnow Professional
Summary
by MITRE
SurfNOW 2.2 allows remote attackers to cause a denial of service (crash) via a series of long HTTP GET requests, possibly triggering a buffer overflow.
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Analysis
by VulDB Data Team • 07/27/2025
The vulnerability identified as CVE-2004-2129 affects SurfNOW 2.2, a web browser application that was widely used in the early 2000s. This security flaw represents a classic buffer overflow vulnerability that can be exploited remotely to cause a denial of service condition. The vulnerability stems from inadequate input validation mechanisms within the application's handling of HTTP GET requests, specifically when processing lengthy URL parameters or query strings. The flaw manifests when an attacker sends a sequence of specially crafted long HTTP GET requests to the affected system, which can lead to memory corruption and subsequent application crash. This type of vulnerability falls under the Common Weakness Enumeration category CWE-121, which deals with stack-based buffer overflow conditions, and is particularly concerning as it can be exploited remotely without requiring authentication or prior access to the system. The attack vector leverages the application's failure to properly validate the length of incoming HTTP request data, allowing malicious input to exceed the allocated buffer space and overwrite adjacent memory locations. From an operational perspective, this vulnerability presents significant risk to organizations that rely on SurfNOW 2.2 for web browsing activities, as it can be exploited by attackers anywhere on the internet to disrupt service availability. The impact extends beyond simple application crashes, as such vulnerabilities often indicate broader architectural weaknesses in the software's input handling and memory management practices. The vulnerability aligns with ATT&CK technique T1499.004, which covers network denial of service attacks, and represents a fundamental security gap that could potentially be chained with other exploits if the application's memory corruption leads to more severe consequences. Organizations utilizing SurfNOW 2.2 should immediately implement network-level mitigations such as rate limiting and request length restrictions to prevent exploitation. Additionally, the vulnerability highlights the importance of input validation and proper memory management practices in software development, particularly for applications that process untrusted network input. The recommended mitigation strategies include applying vendor patches if available, implementing web application firewalls to filter malicious requests, and conducting thorough security assessments of legacy applications that may contain similar vulnerabilities. This case demonstrates the critical need for robust security practices in software design and the potential for seemingly simple input handling flaws to create significant operational disruptions in networked environments.