CVE-2001-1108 in PvsPersonal Video Station
Summary
by MITRE
Directory traversal vulnerability in SnapStream PVS 1.2a allows remote attackers to read arbitrary files via a .. (dot dot) attack in the requested URL.
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Analysis
by VulDB Data Team • 05/09/2025
The vulnerability identified as CVE-2001-1108 represents a critical directory traversal flaw in SnapStream PVS 1.2a, a media streaming application that was widely used for video content delivery. This vulnerability falls under the category of improper input validation and specifically exploits weaknesses in how the application processes URL requests. The flaw enables remote attackers to access files outside the intended directory structure by manipulating the requested URL path using the .. (dot dot) notation, which is a classic technique for bypassing access controls and retrieving unauthorized data.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input within the application's file handling mechanisms. When a user submits a request containing directory traversal sequences, the application fails to properly sanitize or validate the input before processing file access operations. This allows attackers to construct malicious URLs that navigate upward through the directory hierarchy, potentially accessing sensitive system files, configuration data, or other restricted resources that should not be accessible via the web interface. The vulnerability is particularly dangerous because it operates at the application layer and requires no authentication to exploit, making it accessible to any remote user who can reach the affected service.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can lead to complete system compromise when combined with other attack vectors. An attacker could potentially access database files, configuration settings, user credentials, or system binaries that contain sensitive information. The vulnerability also provides a foothold for further exploitation, as access to system files may reveal additional attack surfaces or enable privilege escalation. Given that this vulnerability affects a media streaming application, the potential for data exfiltration is significant, particularly if the application handles sensitive content or user data. The exploitability of this vulnerability is high due to the simplicity of the attack vector and the lack of authentication requirements.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms within the application. Organizations should immediately apply available patches or updates from SnapStream if they still maintain legacy systems, though these may no longer be supported given the age of the software. The recommended approach involves implementing strict path validation that prevents traversal sequences from being processed, using secure coding practices that validate all user input before processing, and implementing proper access controls that restrict file system access to only necessary resources. This vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, and maps to attack techniques in the ATT&CK framework under T1083 for discovering system information and T1566 for social engineering attacks that leverage information disclosure. Organizations should also implement network segmentation and firewall rules to limit access to affected systems, and conduct comprehensive security assessments to identify other potential vulnerabilities in legacy applications that may not be receiving security updates.