CVE-2000-0836 in Camshot Webcam
Summary
by MITRE
Buffer overflow in CamShot WebCam Trial2.6 allows remote attackers to execute arbitrary commands via a long Authorization header.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 04/19/2025
The vulnerability described in CVE-2000-0836 represents a critical buffer overflow flaw within CamShot WebCam Trial2.6 software, a web-based camera management application that was widely distributed in the late 1990s and early 2000s. This particular implementation suffered from inadequate input validation mechanisms that failed to properly sanitize the Authorization header parameter submitted by clients. The flaw manifested when the application processed HTTP requests containing excessively long Authorization headers, causing the software to overwrite adjacent memory regions beyond the allocated buffer boundaries. This memory corruption vulnerability directly aligns with CWE-121, which categorizes buffer overflow conditions that occur when insufficient space is allocated for data, and specifically relates to CWE-787, which addresses out-of-bounds writes in buffer operations. The vulnerability exists at the application layer of the network stack and demonstrates a fundamental flaw in secure coding practices that was prevalent during the early era of web application development.
The technical exploitation of this vulnerability enables remote attackers to execute arbitrary commands on the target system with the privileges of the web server process, typically resulting in complete system compromise. When an attacker crafts a malicious HTTP request containing an Authorization header exceeding the buffer size limits, the overflow causes the program's execution flow to be redirected through memory corruption. This allows attackers to inject and execute malicious code within the application context, potentially leading to unauthorized access, data exfiltration, or system takeover. The attack vector operates entirely over the network without requiring local system access, making it particularly dangerous for publicly exposed web applications. This vulnerability directly maps to ATT&CK technique T1203, which describes exploitation of software vulnerabilities to gain access to systems, and T1059, which covers command and scripting interpreters for execution.
The operational impact of this vulnerability extends beyond immediate system compromise to encompass broader security implications for organizations relying on legacy webcam management solutions. Given that CamShot WebCam Trial2.6 was a commercial product that likely served numerous small to medium enterprises, the potential for widespread exploitation existed across multiple network environments. Organizations using this software faced significant risk of unauthorized access to their camera feeds, potential data breaches, and complete system control by malicious actors. The vulnerability's persistence in older software versions demonstrates the critical importance of regular security updates and patch management, particularly for legacy systems that continue to operate in production environments. The flaw's presence in a trial version of commercial software also highlights how even evaluation copies of security tools can contain exploitable vulnerabilities, emphasizing the need for comprehensive security assessments of all software components regardless of their intended use. Organizations should implement network segmentation, access controls, and regular vulnerability scanning to detect and remediate such issues before they can be exploited by threat actors.