CVE-2025-43937: Dell PowerScale OneFS Info Disclosure Flaw

CVE-2025-43937 Overview

CVE-2025-43937 is a sensitive information disclosure vulnerability in Dell PowerScale OneFS that allows user credentials to be exposed through log files. A low-privileged attacker with local access could potentially exploit this vulnerability to access log files containing sensitive authentication data. The attacker may then leverage the exposed credentials to access the vulnerable application with the privileges of the compromised account.

Critical Impact

User credentials may be disclosed through log files, potentially enabling unauthorized access with compromised account privileges.

Affected Products

• Dell PowerScale OneFS versions prior to 9.12.0.0

Discovery Timeline

• 2026-04-16 - CVE CVE-2025-43937 published to NVD
• 2026-04-16 - Last updated in NVD database

Technical Details for CVE-2025-43937

Vulnerability Analysis

This vulnerability falls under CWE-532 (Insertion of Sensitive Information into Log File), a common information disclosure weakness where applications inadvertently write sensitive data such as passwords, API keys, or session tokens into log files. In the context of Dell PowerScale OneFS, certain user credentials are being logged in a manner that allows low-privileged local users to access and read them.

The attack requires local access to the system and a low level of privileges, combined with some user interaction. When successfully exploited, the vulnerability results in high confidentiality and availability impact, meaning sensitive data can be fully compromised and system availability may be affected.

Root Cause

The root cause of this vulnerability is improper handling of sensitive information during logging operations within Dell PowerScale OneFS. The application fails to adequately sanitize or mask credential data before writing it to log files. This results in plaintext or easily recoverable credentials being persisted in logs that may be accessible to users with limited system privileges.

Attack Vector

The attack vector is local, requiring the attacker to have existing access to the Dell PowerScale OneFS system. The exploitation scenario involves:

1. An attacker with low-level privileges gains access to the system
2. The attacker locates and reads log files containing sensitive credential information
3. The exposed credentials are extracted from the log entries
4. The attacker uses the compromised credentials to escalate access or impersonate the affected user account

The vulnerability mechanism centers around insecure logging practices. When certain operations are performed within OneFS, user credentials are written to log files without proper redaction. These log files may be stored in locations accessible to low-privileged users, or the file permissions may not adequately restrict read access. For detailed technical information, refer to Dell Security Update DSA-2025-347.

Detection Methods for CVE-2025-43937

Indicators of Compromise

• Unusual access patterns to log files from low-privileged user accounts
• Unexpected authentication events using credentials of other users
• Log file access from accounts that do not typically require log analysis
• Suspicious lateral movement or privilege escalation attempts following log file access

Detection Strategies

• Monitor file access events for sensitive log directories on PowerScale OneFS systems
• Implement file integrity monitoring for log file locations to detect unauthorized reads
• Audit authentication logs for unusual login patterns that may indicate credential reuse attacks
• Review access control lists on log directories to identify overly permissive configurations

Monitoring Recommendations

• Enable detailed audit logging for file system access on PowerScale OneFS clusters
• Configure SIEM alerts for access to log files by non-administrative users
• Implement endpoint detection capabilities to identify credential harvesting behavior
• Regularly review user activity logs for anomalous access to system logs and configuration files

How to Mitigate CVE-2025-43937

Immediate Actions Required

• Upgrade Dell PowerScale OneFS to version 9.12.0.0 or later immediately
• Review and restrict file permissions on log directories to limit access to administrative accounts only
• Audit existing log files for potential credential exposure and rotate affected credentials
• Monitor for any indicators of compromise that may suggest prior exploitation

Patch Information

Dell has released a security update addressing this vulnerability. Organizations should upgrade to Dell PowerScale OneFS version 9.12.0.0 or later. The official security advisory with patch details is available at Dell Security Update DSA-2025-347.

Workarounds

• Restrict log file access permissions to only administrative users who require access for troubleshooting
• Implement additional access controls and monitoring on log storage locations
• Consider implementing log rotation with secure deletion to minimize exposure window
• If immediate patching is not possible, review and manually redact sensitive information from existing logs

# Example: Restrict log file permissions (verify paths for your environment)
chmod 640 /var/log/ifs/*
chown root:wheel /var/log/ifs/*