CVE-2000-0043 in WebCam
Summary
by MITRE
Buffer overflow in CamShot WebCam HTTP server allows remote attackers to execute commands via a long GET request.
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Analysis
by VulDB Data Team • 02/03/2025
The vulnerability identified as CVE-2000-0043 represents a critical buffer overflow flaw within the CamShot WebCam HTTP server implementation that fundamentally compromises the security posture of affected systems. This issue arises from inadequate input validation mechanisms within the web server component that processes HTTP GET requests, creating an exploitable condition where maliciously crafted requests can overwrite adjacent memory regions. The flaw specifically manifests when the server receives a GET request containing an excessively long parameter string, which exceeds the allocated buffer space and triggers unauthorized memory modification. Such buffer overflow conditions are classified under CWE-121 as stack-based buffer overflow, where the overflow occurs in the stack memory region, potentially allowing attackers to manipulate program execution flow. The vulnerability directly enables remote code execution capabilities, as demonstrated by the ability to inject and execute arbitrary commands on the target system through carefully constructed HTTP requests.
The technical exploitation of this vulnerability leverages the fundamental weakness in input handling where the CamShot WebCam server fails to properly validate the length of incoming GET request parameters before processing them. When an attacker sends a GET request with an overly long string parameter, the server's buffer management routines cannot accommodate the excessive data, resulting in memory corruption that can be manipulated to redirect program execution. The attack vector operates entirely over the network using standard HTTP protocols, making it accessible to remote adversaries without requiring physical access or local privileges. This type of vulnerability aligns with ATT&CK technique T1203, which describes exploitation of software vulnerabilities to gain code execution, and represents a classic example of how improper input validation can lead to complete system compromise. The buffer overflow occurs in the HTTP server's request parsing component, where the server fails to implement bounds checking on user-supplied data before copying it into fixed-size memory buffers, creating an exploitable condition that can be leveraged for privilege escalation.
The operational impact of CVE-2000-0043 extends beyond simple remote code execution to encompass complete system compromise and potential data breaches. Once exploited, attackers can gain unauthorized access to the web server and underlying system, potentially enabling them to install backdoors, exfiltrate sensitive data, or use the compromised system as a launching point for further attacks within the network infrastructure. The vulnerability affects the integrity and availability of the web camera service, as successful exploitation can lead to service disruption or complete system compromise. Organizations utilizing CamShot WebCam systems would face significant security risks, particularly in environments where these devices are exposed to untrusted networks or where they serve as entry points for broader network infiltration attempts. The vulnerability's classification as a remote code execution flaw means that attackers can operate without detection from standard network monitoring tools, as the malicious activity appears as legitimate HTTP traffic. Security professionals should note that this vulnerability type was prevalent in early web server implementations and highlights the critical importance of proper input validation and memory management practices in network service development. The flaw demonstrates how seemingly simple buffer management issues can create severe security implications, emphasizing the need for robust software security practices and regular vulnerability assessments.