CVE-2008-0758 in ExtremeZ-IP File
Summary
by MITRE
Multiple directory traversal vulnerabilities in the Zidget/HTTP embedded HTTP server in ExtremeZ-IP File and Print Server 5.1.2x15 and earlier allow remote attackers to read arbitrary (1) gif, (2) png, (3) jpg, (4) xml, (5) ico, (6) zip, and (7) html files via a "..\" (dot dot backslash) sequence in the filename.
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Analysis
by VulDB Data Team • 08/05/2019
The vulnerability identified as CVE-2008-0758 represents a critical directory traversal flaw within the Zidget/HTTP embedded HTTP server component of ExtremeZ-IP File and Print Server versions 5.1.2x15 and earlier. This vulnerability exposes the system to remote exploitation where attackers can manipulate file access requests through specially crafted directory traversal sequences. The flaw specifically affects the server's handling of filename parameters, allowing unauthorized access to sensitive files stored on the system through the use of "..\" sequences that navigate upward through the directory structure.
This directory traversal vulnerability operates by exploiting insufficient input validation in the HTTP server's file handling mechanisms. When a client requests a file through the embedded HTTP server, the system fails to properly sanitize the filename parameter, enabling attackers to append directory traversal sequences that bypass normal file access controls. The vulnerability affects multiple file types including image formats like gif, png, and jpg, as well as document formats such as xml, ico, zip, and html files, indicating the scope of potential exposure across different file categories. The attack vector relies on the manipulation of backslash sequences that the server interprets as directory navigation commands rather than legitimate file path specifications.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the ability to potentially read system configuration files, log files, and other sensitive data that may contain credentials, system information, or proprietary data. This represents a significant security risk for organizations using ExtremeZ-IP File and Print Server, as the vulnerability allows for arbitrary file reading without authentication requirements. The exposure of system files through this vulnerability could lead to information disclosure, privilege escalation opportunities, and potential further exploitation of the underlying system. From an attacker perspective, this vulnerability enables reconnaissance activities and data exfiltration that could compromise the entire network infrastructure.
The vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. This classification emphasizes the fundamental flaw in input validation and access control mechanisms within the embedded HTTP server. The attack pattern follows typical directory traversal techniques documented in the MITRE ATT&CK framework under the T1083 technique for discovering files and directories, where adversaries leverage path traversal vulnerabilities to access restricted system resources. Organizations affected by this vulnerability should immediately implement mitigations including patching the software to the latest version, implementing proper input validation, and restricting network access to the affected server components.
Mitigation strategies for this vulnerability should include immediate deployment of vendor patches and updates to eliminate the directory traversal flaw in the embedded HTTP server. Network segmentation and access controls should be implemented to limit exposure of the affected system to untrusted networks, while proper input validation should be enforced at all levels of the application stack. Regular security assessments and vulnerability scanning should be conducted to identify similar path traversal issues in other embedded systems and applications. Additionally, monitoring and logging mechanisms should be enhanced to detect suspicious file access patterns that may indicate exploitation attempts, as this vulnerability represents a well-known attack pattern that security teams should be prepared to identify and respond to promptly.