CVE-2024-34995 in svnWebUI
Summary
by MITRE • 05/24/2024
svnWebUI v1.8.3 was discovered to contain an arbitrary file deletion vulnerability via the dirTemps parameter under com.cym.controller.UserController#importOver. This vulnerability allows attackers to delete arbitrary files via a crafted POST request.
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Analysis
by VulDB Data Team • 05/24/2024
The vulnerability identified as CVE-2024-34995 affects svnWebUI version 1.8.3 and represents a critical arbitrary file deletion flaw that stems from inadequate input validation within the application's file management functionality. This issue specifically manifests in the com.cym.controller.UserController#importOver method where the dirTemps parameter is processed without proper sanitization or authorization checks, creating a pathway for malicious actors to execute unauthorized file deletion operations across the affected system's file hierarchy.
The technical implementation of this vulnerability exploits a classic path traversal and privilege escalation vector where attacker-controlled input directly influences file system operations. When the dirTemps parameter receives malicious input containing directory traversal sequences or absolute file paths, the application processes these inputs without adequate validation mechanisms to prevent unauthorized access to critical system files. This flaw operates at the application layer and can be exploited through a crafted POST request that targets the UserController endpoint, effectively bypassing normal file system access controls and authentication mechanisms.
The operational impact of CVE-2024-34995 extends beyond simple file deletion capabilities as it can enable attackers to compromise entire system operations by removing critical application files, configuration data, or even system binaries. This vulnerability aligns with CWE-22 Path Traversal and CWE-73 Path Traversal which categorize improper input validation leading to unauthorized file system access. The attack surface is particularly concerning in environments where svnWebUI manages version control repositories containing sensitive source code, configuration files, or other proprietary data that could be permanently destroyed or rendered inaccessible through this vulnerability.
From a cybersecurity perspective, this vulnerability demonstrates a fundamental lack of input sanitization and access control enforcement within the application's file management subsystem. The flaw represents a direct violation of the principle of least privilege and can be leveraged by attackers to escalate their privileges within the system. According to ATT&CK framework, this vulnerability maps to T1059 Command and Scripting Interpreter and T1485 Data Destruction, as it enables adversaries to execute destructive operations on target systems through legitimate application interfaces.
Mitigation strategies for CVE-2024-34995 should prioritize immediate application patching or upgrade to versions that address the input validation deficiencies in the UserController#importOver method. Organizations should implement strict input validation mechanisms that sanitize all user-supplied parameters, particularly those used in file system operations, and enforce proper access controls that prevent directory traversal attacks. Additionally, network segmentation and application firewalls should be deployed to limit access to the vulnerable endpoint, while comprehensive monitoring and logging should be implemented to detect suspicious file deletion activities. The remediation process must include thorough code review of all file system operations and implementation of secure coding practices that prevent similar vulnerabilities from emerging in future development cycles.