CVE-2007-2668 in webdesproxy
Summary
by MITRE
Buffer overflow in webdesproxy 0.0.1 allows remote attackers to execute arbitrary code via a long URL, possibly involving the process_connection_request function in webdesproxy.c.
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Analysis
by VulDB Data Team • 09/15/2024
The vulnerability identified as CVE-2007-2668 represents a critical buffer overflow flaw in webdesproxy version 0.0.1, a web proxy server implementation that was widely used in enterprise environments during the early 2000s. This vulnerability resides within the process_connection_request function in the webdesproxy.c source file, making it a fundamental architectural weakness in the proxy's request handling mechanism. The buffer overflow occurs when the application processes incoming HTTP requests containing excessively long URLs, creating a potential attack vector that could be exploited by remote adversaries without requiring authentication or privileged access.
The technical nature of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. In the context of webdesproxy, when a maliciously crafted URL exceeds the allocated buffer size, the overflow can overwrite critical program variables, return addresses, and function pointers stored on the stack. This memory corruption enables attackers to manipulate the program flow and potentially execute arbitrary code with the privileges of the webdesproxy process, typically running with elevated system permissions to handle network traffic. The vulnerability specifically exploits the lack of input validation for URL length, making it particularly dangerous as it can be triggered through standard web browsing activities or automated attack tools.
The operational impact of CVE-2007-2668 extends beyond simple code execution, as it provides attackers with a potential foothold for more sophisticated attacks within network environments. Once successfully exploited, the vulnerability could enable attackers to establish persistent access, escalate privileges, or use the compromised proxy as a pivot point for attacking internal network resources. This aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1059.007 for command and scripting interpreter. Organizations running vulnerable versions of webdesproxy were particularly at risk since proxy servers often serve as critical network infrastructure components that handle sensitive traffic and may have access to internal systems. The vulnerability's remote exploitability meant that attackers could compromise systems from outside the network perimeter, making it a significant threat to organizations that relied on this proxy implementation for web access control and filtering.
Mitigation strategies for CVE-2007-2668 require immediate action to address the buffer overflow vulnerability through proper input validation and code-level fixes. Organizations should implement network segmentation to limit exposure of vulnerable proxy servers and deploy intrusion detection systems to monitor for suspicious URL patterns that might indicate exploitation attempts. The most effective remediation involves updating to a patched version of webdesproxy that includes proper bounds checking for URL handling and implements stack protection mechanisms. Additionally, security teams should consider implementing web application firewalls that can detect and block malformed URL requests, and establish monitoring procedures to identify unusual proxy behavior that might indicate exploitation attempts. The vulnerability serves as a reminder of the critical importance of input validation in network applications and the potential consequences of inadequate buffer management in server-side software components, particularly those handling untrusted user input through network protocols.