CVE-2024-53298: Dell PowerScale OneFS Auth Bypass Flaw

CVE-2024-53298 Overview

CVE-2024-53298 is a missing authorization vulnerability affecting Dell PowerScale OneFS, a scale-out network-attached storage (NAS) operating system. The vulnerability exists in the NFS export functionality and allows unauthenticated attackers with network access to bypass authorization controls, potentially gaining full filesystem access. An attacker can read, modify, and delete arbitrary files on the affected system, making this a severe threat to data integrity and confidentiality.

Critical Impact

Unauthenticated remote attackers can exploit this missing authorization flaw to gain unauthorized filesystem access, enabling them to read, modify, and delete arbitrary files, potentially leading to full system compromise.

Affected Products

• Dell PowerScale OneFS versions 9.5.0.0 through 9.10.0.1

Discovery Timeline

• June 20, 2025 - CVE-2024-53298 published to NVD
• July 11, 2025 - Last updated in NVD database

Technical Details for CVE-2024-53298

Vulnerability Analysis

This vulnerability is classified as CWE-862 (Missing Authorization), indicating that the NFS export component in Dell PowerScale OneFS fails to properly verify that a user is authorized to perform requested actions. The flaw allows unauthenticated attackers with network access to interact with NFS exports without proper authorization checks, bypassing intended access controls entirely.

The impact is severe as successful exploitation grants attackers complete filesystem access. This means sensitive data can be exfiltrated (confidentiality breach), files can be tampered with or corrupted (integrity breach), and critical system or data files can be deleted (availability impact). Dell explicitly states this vulnerability can be leveraged to fully compromise affected systems.

Root Cause

The root cause is a missing authorization check in the NFS export functionality of Dell PowerScale OneFS. The system fails to properly validate whether incoming NFS requests originate from authorized users or systems before granting access to the filesystem. This allows unauthenticated network attackers to interact with exported filesystems as if they were legitimate authorized clients.

Attack Vector

The attack vector is network-based, requiring no authentication, no user interaction, and low complexity to exploit. An attacker with network connectivity to the affected PowerScale OneFS system can send specially crafted NFS requests to access exported filesystems. Since no privileges are required, any attacker who can reach the NFS service over the network can potentially exploit this vulnerability.

The attack proceeds as follows: an attacker identifies a vulnerable Dell PowerScale OneFS system exposing NFS exports on the network. They then send NFS requests directly to the target without providing authentication credentials. Due to the missing authorization checks, the system processes these requests and grants filesystem access, allowing the attacker to enumerate directories, read sensitive files, modify data, or delete files at will.

Detection Methods for CVE-2024-53298

Indicators of Compromise

• Unexpected NFS mount requests or connections from unauthorized IP addresses
• Anomalous file access patterns on NFS exports, particularly from unauthenticated sources
• Unexplained file modifications, deletions, or new files appearing in exported directories
• Unusual outbound data transfers from the PowerScale system indicative of data exfiltration

Detection Strategies

• Monitor NFS server logs for connection attempts from unauthorized or unknown client IP addresses
• Implement network traffic analysis to detect anomalous NFS protocol activity
• Deploy file integrity monitoring (FIM) on critical directories within NFS exports to detect unauthorized changes
• Use SentinelOne Singularity XDR to correlate network and file system telemetry for comprehensive threat detection

Monitoring Recommendations

• Enable detailed audit logging on Dell PowerScale OneFS systems for all NFS operations
• Configure alerts for access attempts to sensitive directories from unexpected network segments
• Regularly review NFS export configurations to ensure proper access controls are in place
• Integrate PowerScale logs with SIEM solutions for centralized monitoring and correlation

How to Mitigate CVE-2024-53298

Immediate Actions Required

• Upgrade Dell PowerScale OneFS to a patched version as recommended by Dell immediately
• Review and restrict network access to NFS exports using firewall rules to limit exposure
• Audit current NFS export configurations and remove any unnecessary or overly permissive exports
• Isolate affected PowerScale systems from untrusted network segments until patching is complete

Patch Information

Dell has released a security update addressing this vulnerability. Organizations should refer to Dell Security Advisory DSA-2025-208 for detailed patch information and upgrade instructions. Dell strongly recommends customers upgrade at the earliest opportunity to remediate this critical vulnerability.

Workarounds

• Restrict NFS export access to trusted IP addresses or network ranges using export configuration options
• Implement network segmentation to isolate PowerScale systems from untrusted networks
• Disable NFS exports entirely if not required for business operations until patching can be completed
• Deploy network-level access controls such as firewalls or ACLs to limit connectivity to NFS services

# Example: Restrict NFS access at the network level (firewall rule)
# Allow NFS traffic only from trusted subnet
iptables -A INPUT -p tcp --dport 2049 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 2049 -j DROP