CVE-2022-3939 in ferry
Summary
by MITRE • 11/11/2022
A vulnerability, which was classified as critical, has been found in lanyulei ferry. Affected by this issue is some unknown functionality of the file apis/public/file.go of the component API. The manipulation of the argument file leads to path traversal. The attack may be launched remotely. VDB-213446 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 12/17/2022
The vulnerability identified as CVE-2022-3939 represents a critical path traversal flaw within the lanyulei ferry application, specifically affecting the API component located in apis/public/file.go. This security weakness stems from inadequate input validation when processing file arguments, creating a significant exposure that allows attackers to manipulate file paths and access unauthorized resources. The vulnerability's classification as critical indicates the potential for severe impact on system integrity and data confidentiality, making it a prime target for malicious exploitation.
The technical exploitation of this vulnerability occurs through remote manipulation of the file argument parameter, enabling attackers to traverse directory structures beyond the intended scope of the application's file handling capabilities. This path traversal vulnerability operates by leveraging specially crafted input that can bypass normal access controls and directory restrictions, potentially allowing unauthorized access to sensitive files, system directories, or other restricted resources within the application's operational environment. The flaw demonstrates characteristics consistent with CWE-22 Path Traversal vulnerabilities, where insufficient input validation permits attackers to access files outside the intended directory structure.
The operational impact of this vulnerability extends beyond simple file access, as it can enable attackers to potentially read sensitive configuration files, access database credentials, retrieve source code, or even execute arbitrary code depending on the application's underlying architecture and file permissions. Remote exploitation capability means that attackers do not require physical access to the system, making this vulnerability particularly dangerous as it can be exploited from anywhere on the network. The vulnerability's presence in the API layer suggests that it may affect multiple application functions and could potentially provide attackers with access to core application functionality and data repositories.
Security mitigations for this vulnerability should focus on implementing robust input validation and sanitization measures within the affected API component, specifically addressing the file argument processing in apis/public/file.go. Organizations should enforce strict path validation, implement proper access controls, and employ techniques such as canonicalization and directory traversal prevention to prevent attackers from manipulating file paths. The implementation of principle of least privilege access controls, regular security code reviews, and comprehensive penetration testing should be conducted to identify and remediate similar vulnerabilities throughout the application's codebase. Additionally, monitoring and logging mechanisms should be enhanced to detect suspicious file access patterns that may indicate exploitation attempts. This vulnerability aligns with ATT&CK technique T1083 File and Directory Discovery, which involves adversaries seeking to identify file systems and directories within compromised systems.