CVE-1999-0270 in IRIX
Summary
by MITRE
Directory traversal vulnerability in pfdispaly.cgi program (sometimes referred to as "pfdisplay") for SGI's Performer API Search Tool (performer_tools) allows remote attackers to read arbitrary files.
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Analysis
by VulDB Data Team • 04/17/2026
The vulnerability identified as CVE-1999-0270 represents a critical directory traversal flaw within the pfdispaly.cgi component of SGI's Performer API Search Tool, commonly known as performer_tools. This web-based interface for searching through SGI Performer API documentation and resources was susceptible to exploitation by remote attackers who could manipulate input parameters to access files outside the intended directory structure. The vulnerability stems from inadequate input validation and sanitization within the CGI script that processes user requests for API documentation. The flaw allows attackers to bypass normal file access controls and retrieve arbitrary files from the server's filesystem, potentially exposing sensitive information, configuration files, or system resources that should remain protected.
The technical nature of this vulnerability aligns with CWE-22, which categorizes directory traversal attacks as a common weakness in software design and implementation. The pfdispaly.cgi program failed to properly validate or sanitize user-supplied input parameters that specified file paths or document references. When attackers could manipulate these parameters using sequences such as "../" or similar path traversal techniques, they could navigate beyond the intended document directory and access files that were not meant to be publicly accessible. This type of vulnerability operates at the application layer and specifically targets the web server's file system access mechanisms, allowing unauthorized data retrieval through carefully crafted requests that exploit the lack of proper input filtering.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the capability to access potentially sensitive system information that could be used for further exploitation. Remote attackers could leverage this vulnerability to access configuration files, source code, database connection details, or other system artifacts that might reveal system architecture, authentication mechanisms, or other security-relevant information. The vulnerability's remote nature means that attackers do not require local access or physical presence to exploit it, making it particularly dangerous in networked environments where the affected web server is accessible from the internet. Additionally, the exposure of system files could potentially lead to privilege escalation opportunities or serve as a stepping stone for more sophisticated attacks targeting the underlying system infrastructure.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization within the affected CGI application. The most effective approach involves implementing strict path validation that ensures all file access requests are confined to predefined directories and that any attempt to traverse parent directories is rejected. This can be achieved through the implementation of allow-list validation that explicitly permits only known good paths rather than attempting to filter out dangerous input patterns. Additionally, the application should be configured to run with minimal required privileges and should not have access to sensitive system directories. Security measures should include regular updates and patches for the performer_tools software, proper network segmentation to limit access to the affected web server, and monitoring for suspicious access patterns that might indicate exploitation attempts. Organizations should also consider implementing web application firewalls and intrusion detection systems to help identify and block attempts to exploit directory traversal vulnerabilities. The vulnerability demonstrates the critical importance of validating all user inputs and implementing proper access controls in web applications, particularly those that handle file system operations.