CVE-2012-4959 in File Reporter
Summary
by MITRE
Directory traversal vulnerability in NFRAgent.exe in Novell File Reporter 1.0.2 allows remote attackers to upload and execute files via a 130 /FSF/CMD request with a .. (dot dot) in a FILE element of an FSFUI record.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/12/2024
The vulnerability identified as CVE-2012-4959 represents a critical directory traversal flaw within the Novell File Reporter 1.0.2 system, specifically affecting the NFRAgent.exe component. This weakness enables remote attackers to exploit the file handling mechanism through a carefully crafted 130 /FSF/CMD request that incorporates a .. (dot dot) sequence within the FILE element of an FSFUI record. The vulnerability resides in the improper validation of file paths during the processing of filesystem commands, creating a pathway for unauthorized file operations that bypass normal security boundaries.
The technical exploitation of this vulnerability leverages the fundamental flaw in path normalization and validation within the NFRAgent.exe service. When processing the FSFUI record structure, the system fails to adequately sanitize or validate the FILE element content, allowing attackers to inject directory traversal sequences that can navigate beyond the intended directory boundaries. This misconfiguration enables attackers to specify arbitrary file paths that can overwrite existing files or create new files in directories outside the normal operational scope of the application. The vulnerability specifically manifests when the system processes the 130 /FSF/CMD request type, which is designed for filesystem command execution, but the implementation lacks proper input validation mechanisms.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the capability to execute arbitrary code on the target system. By leveraging the directory traversal mechanism, an attacker can upload malicious files to critical system directories or overwrite legitimate executables with malicious counterparts. This creates a persistent threat vector that can lead to complete system compromise, data exfiltration, or disruption of critical file reporting services. The remote nature of the attack means that exploitation does not require local system access, making the vulnerability particularly dangerous for network-connected systems. According to CWE classification, this vulnerability maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal.
The attack vector for this vulnerability aligns with techniques described in the ATT&CK framework under the T1059.007 sub-technique for "Command and Scripting Interpreter: PowerShell" and T1078.004 for "Valid Accounts: Cloud Accounts," though the specific exploitation mechanism targets the underlying filesystem rather than the command interpreter directly. The vulnerability essentially allows attackers to leverage the legitimate file reporting functionality to perform unauthorized filesystem operations, which can be classified as a privilege escalation or lateral movement vector depending on the target system's security posture. Organizations using Novell File Reporter 1.0.2 are particularly at risk as the vulnerability affects the core agent functionality responsible for file system monitoring and reporting.
Mitigation strategies for CVE-2012-4959 should focus on immediate patching of the affected Novell File Reporter software to the latest available version that addresses the directory traversal vulnerability. Network segmentation and firewall rules should be implemented to restrict access to the NFRAgent.exe service to only trusted administrative systems. Additionally, implementing input validation controls and restricting write permissions to critical system directories can help reduce the impact of potential exploitation attempts. Organizations should also conduct comprehensive vulnerability assessments to identify any other systems running vulnerable versions of the software and ensure that all file handling components properly validate and sanitize input parameters before processing filesystem operations. The remediation process must include monitoring for suspicious file access patterns and implementing proper logging mechanisms to detect potential exploitation attempts.