CVE-2024-7340 in Traverse
Summary
by MITRE • 07/31/2024
The Weave server API allows remote users to fetch files from a specific directory, but due to a lack of input validation, it is possible to traverse and leak arbitrary files remotely. In various common scenarios, this allows a low-privileged user to assume the role of the server admin.
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Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2024-7340 affects the Weave server API implementation where insufficient input validation creates a directory traversal flaw that enables remote attackers to access arbitrary files on the server filesystem. This security weakness stems from the API's failure to properly sanitize user-supplied input parameters that are used to determine file paths during file retrieval operations. The flaw exists in the server's file access mechanism where directory traversal sequences such as ../ or ..\ are not adequately filtered or rejected, allowing malicious actors to navigate beyond the intended directory boundaries and access sensitive files that should remain restricted.
The technical exploitation of this vulnerability aligns with common directory traversal attack patterns and maps directly to CWE-22 - Improper Limitation of a Pathname to a Restricted Directory. This weakness occurs when a program allows input to specify a file or directory path in a way that bypasses the intended access restrictions. The vulnerability is particularly dangerous because it can be exploited by low-privileged users who typically would not have access to administrative functions, yet through this flaw can potentially assume administrative privileges or access confidential server data. The impact extends beyond simple file reading as the leaked information could include configuration files, database credentials, private keys, or application source code that would provide attackers with significant system intelligence.
From an operational perspective, this vulnerability creates a severe risk to system integrity and confidentiality as it allows for unauthorized data exfiltration and privilege escalation. Attackers can leverage this flaw to access critical system components such as application configuration files that may contain database connection strings, API keys, or other sensitive credentials. The attack vector is particularly concerning because it requires minimal privileges to exploit and can be executed remotely without requiring authentication. This vulnerability also represents a potential entry point for further attacks within the network infrastructure, as the leaked information could be used to identify additional targets or vulnerabilities in the broader system landscape. The risk is compounded by the fact that such directory traversal vulnerabilities are often difficult to detect through standard security scanning tools due to their reliance on specific path manipulation techniques.
The mitigation strategies for CVE-2024-7340 should focus on implementing proper input validation and sanitization measures that prevent directory traversal attempts. Organizations should immediately implement path normalization and validation techniques that reject or filter out potentially malicious path sequences before they are processed by the file access functions. This includes implementing strict input validation that ensures all file paths are resolved within the intended directory boundaries and that relative path traversal sequences are explicitly rejected. The solution should also incorporate proper access control mechanisms that enforce the principle of least privilege, ensuring that even if traversal occurs, the attacker cannot access files beyond the designated scope. Additionally, implementing web application firewalls and security monitoring systems can help detect and prevent exploitation attempts. The remediation process should follow established security practices including input validation, secure coding standards, and regular security assessments to prevent similar vulnerabilities from being introduced in future implementations. This vulnerability also highlights the importance of adhering to ATT&CK framework techniques such as T1059.007 - Command and Scripting Interpreter: PowerShell and T1566.001 - Phishing: Spearphishing Attachment, as attackers may use the leaked information to conduct further targeted attacks or establish persistent access to the compromised system.