CVE-2020-7008 in VBASE Editor
Summary
by MITRE
VISAM VBASE Editor version 11.5.0.2 and VBASE Web-Remote Module may allow input passed in the URL that is not properly verified before use, which may allow an attacker to read arbitrary files from local resources.
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Analysis
by VulDB Data Team • 05/13/2024
The vulnerability identified as CVE-2020-7008 affects VISAM VBASE Editor version 11.5.0.2 and the VBASE Web-Remote Module, presenting a critical security flaw that stems from insufficient input validation in URL parameters. This weakness allows malicious actors to exploit the system by crafting specially formatted URLs that bypass normal access controls and potentially read arbitrary files from the local filesystem. The vulnerability represents a classic case of insecure input handling that can lead to unauthorized data access and potential system compromise.
The technical implementation of this flaw involves improper validation of user-supplied input within the URL parsing mechanism of the web-based modules. When the application processes URL parameters containing file paths or references, it fails to adequately sanitize or verify the input before using it in file system operations. This creates an opportunity for path traversal attacks where attackers can manipulate URL parameters to navigate the file system and access files that should normally be restricted. The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack vector specifically targets the web interface components that handle remote access and file operations, making the exploitation particularly dangerous in networked environments.
The operational impact of this vulnerability extends beyond simple unauthorized file access, potentially enabling attackers to extract sensitive configuration files, database credentials, application source code, or other critical system information. Given that this affects web-based remote modules, the attack surface includes not only local file system access but also potential escalation to broader system compromise if the vulnerable application runs with elevated privileges. The vulnerability can be exploited remotely through web browser interactions, making it particularly concerning for organizations that expose these modules to untrusted networks or users. Attackers can leverage this flaw to perform reconnaissance activities, gather intelligence for further attacks, or potentially establish persistent access through the compromise of sensitive files.
Security mitigations for CVE-2020-7008 should focus on implementing robust input validation and sanitization mechanisms within the URL processing components of the VBASE modules. Organizations should immediately apply vendor-provided patches or updates that address the specific input validation deficiencies. Additionally, implementing proper access controls and privilege separation can reduce the impact of successful exploitation attempts. Network segmentation and monitoring of web traffic can help detect anomalous URL patterns that may indicate exploitation attempts. The remediation efforts should align with ATT&CK technique T1059.007 for command and script interpreter, as attackers may attempt to leverage the compromised system for further malicious activities once they gain access to sensitive files. Regular security assessments and code reviews focusing on input validation practices should be implemented to prevent similar vulnerabilities in future development cycles.