CVE-2001-0308 in Java HTTP Server
Summary
by MITRE
UploadServlet in Bajie HTTP JServer 0.78, and possibly other versions before 0.80, allows remote attackers to execute arbitrary commands by calling the servlet to upload a program, then using a ... (modified ..) to access the file that was created for the program.
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Analysis
by VulDB Data Team • 10/07/2025
The vulnerability identified as CVE-2001-0308 represents a critical command execution flaw in Bajie HTTP JServer version 0.78 and earlier versions before 0.80. This vulnerability resides within the UploadServlet component, which is designed to handle file upload operations within the web server environment. The flaw enables remote attackers to escalate privileges and execute arbitrary code on the target system through a carefully crafted sequence of operations involving file upload and subsequent access manipulation.
The technical mechanism of this vulnerability stems from inadequate input validation and improper file handling within the UploadServlet implementation. When a malicious user uploads a file through the vulnerable servlet, the system fails to properly sanitize the file path or name, allowing attackers to manipulate the upload process using directory traversal techniques. The specific exploitation involves uploading a malicious program file and then employing path manipulation to access the uploaded file, bypassing normal access controls and security boundaries that should prevent unauthorized execution of arbitrary code.
This vulnerability directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as directory traversal or path traversal attacks. The flaw creates an environment where attackers can move outside the intended directory structure and access files or execute programs that should remain restricted. The impact extends beyond simple file access to full system compromise, as successful exploitation allows attackers to execute arbitrary commands with the privileges of the web server process, potentially leading to complete system takeover.
The operational impact of CVE-2001-0308 is severe and multifaceted, affecting organizations that rely on the Bajie HTTP JServer for web hosting or application deployment. Attackers can leverage this vulnerability to establish persistent backdoors, exfiltrate sensitive data, or use the compromised system as a launch point for further attacks within the network infrastructure. The vulnerability's remote exploitability means that attackers do not require physical access or local network presence to initiate the attack, making it particularly dangerous in publicly accessible environments. Additionally, the vulnerability's presence in versions prior to 0.80 suggests a widespread risk across installations that have not been updated, creating a significant attack surface for threat actors.
The attack pattern associated with this vulnerability aligns with ATT&CK technique T1059.007, which covers command and script injection through web shells or direct command execution. The exploitation chain typically involves uploading a malicious payload, manipulating the file path to bypass restrictions, and then executing the uploaded program to achieve the attacker's objectives. Mitigation strategies should focus on immediate patching to version 0.80 or later, implementing proper input validation for all file upload operations, and establishing robust access controls that prevent directory traversal attacks. Network segmentation and firewall rules can provide additional defense-in-depth measures, while regular security audits should verify that no unauthorized file upload capabilities exist within the system. Organizations should also implement monitoring for suspicious file upload activities and ensure that all web applications undergo thorough security testing to identify similar vulnerabilities in other components of their infrastructure.