CVE-2018-1495 in FlashSystem V840
Summary
by MITRE
IBM FlashSystem V840 and V900 products could allow an authenticated attacker with specialized access to overwrite arbitrary files which could cause a denial of service. IBM X-Force ID: 141148.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 03/17/2023
The vulnerability identified as CVE-2018-1495 affects IBM FlashSystem V840 and V900 storage systems, representing a critical security flaw that enables authenticated attackers with specialized access to perform arbitrary file overwrites. This vulnerability resides within the storage system's file management mechanisms and specifically targets the underlying operating system components that handle file operations. The flaw allows an attacker who has already established authentication credentials and possesses specialized knowledge of the system's internal workings to manipulate file structures in ways that could lead to system instability and operational disruption.
The technical nature of this vulnerability stems from inadequate input validation and file handling procedures within the FlashSystem's administrative interfaces and underlying file system operations. When authenticated users with specialized access attempt to perform certain file operations, the system fails to properly validate the targets of these operations, creating opportunities for malicious overwrite attempts. This weakness aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal vulnerabilities. The vulnerability specifically manifests when the system processes file manipulation commands without sufficient safeguards against malicious path specifications that could target system-critical files.
From an operational impact perspective, this vulnerability poses significant risks to enterprise storage environments where IBM FlashSystem V840 and V900 appliances serve as critical infrastructure components. The ability to overwrite arbitrary files could lead to complete system denial of service, data corruption, or unauthorized data access. Organizations relying on these storage systems for mission-critical operations face potential downtime, data loss, and service disruption. The specialized access requirement suggests that this vulnerability may be exploited by insider threats or attackers who have already compromised legitimate user credentials, making it particularly dangerous in environments where privileged access is widely distributed. The vulnerability's impact is further amplified by the nature of storage systems, where file corruption can cascade into broader system failures and data integrity issues.
The exploitation of this vulnerability demonstrates characteristics consistent with techniques described in the MITRE ATT&CK framework under the "File and Directory Permissions Modification" tactic. Attackers leveraging this flaw could potentially target system configuration files, log files, or critical binaries to achieve their objectives. The IBM X-Force ID 141148 associated with this vulnerability indicates the severity and recognition of the threat by IBM's security research team. Organizations should implement comprehensive monitoring solutions to detect unusual file modification patterns and establish strict access controls to limit the number of users with specialized privileges. Patch management procedures should be prioritized to address this vulnerability, as it represents a fundamental flaw in the storage system's file handling security model.
Mitigation strategies should focus on implementing least privilege access controls, restricting specialized access to only essential personnel, and deploying robust monitoring solutions that can detect anomalous file operations. Network segmentation and firewall rules should be configured to limit access to storage management interfaces to trusted administrative networks. Regular security assessments and penetration testing should be conducted to identify potential exploitation vectors, while system administrators should maintain detailed logs of all file operations for forensic analysis. Additionally, organizations should ensure that their incident response procedures include specific protocols for handling storage system vulnerabilities and that all personnel are trained to recognize signs of potential exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that protect storage infrastructure from both external and internal threats.