CVE-2025-21111: Dell VxRail Information Disclosure Flaw

CVE-2025-21111 Overview

CVE-2025-21111 is a plaintext storage of password vulnerability affecting Dell VxRail hyperconverged infrastructure appliances running firmware versions 8.0.000 through 8.0.311. This vulnerability allows a high-privileged attacker with local access to potentially exploit insecure credential storage, leading to information exposure of sensitive authentication data.

The vulnerability is classified under CWE-256 (Plaintext Storage of a Password) and CWE-522 (Insufficiently Protected Credentials), indicating fundamental weaknesses in how the affected systems handle credential security. Organizations running affected VxRail appliances in their data center environments should prioritize remediation to prevent potential credential theft and subsequent lateral movement attacks.

Critical Impact

High-privileged local attackers can access plaintext passwords stored on affected Dell VxRail systems, potentially enabling credential theft and escalated access to virtualized infrastructure environments.

Affected Products

• Dell VxRail D-Series (D560, D560F) firmware versions 8.0.000 - 8.0.311
• Dell VxRail E-Series (E460, E560, E560F, E560N, E660, E660F, E660N, E665, E665F, E665N) firmware versions 8.0.000 - 8.0.311
• Dell VxRail G-Series (G560, G560F) firmware versions 8.0.000 - 8.0.311
• Dell VxRail P-Series (P470, P570, P570F, P580N, P670F, P670N, P675F, P675N) firmware versions 8.0.000 - 8.0.311
• Dell VxRail S-Series (S470, S570, S670) firmware versions 8.0.000 - 8.0.311
• Dell VxRail V-Series (V470, V570, V670F) firmware versions 8.0.000 - 8.0.311
• Dell VxRail VD-Series (VD-4000R, VD-4000W, VD-4000Z, VD-4510C, VD-4520C) firmware versions 8.0.000 - 8.0.311
• VCF-enabled variants of the above models

Discovery Timeline

• 2025-01-08 - CVE-2025-21111 published to NVD
• 2025-01-24 - Last updated in NVD database

Technical Details for CVE-2025-21111

Vulnerability Analysis

The vulnerability stems from improper credential storage practices within the Dell VxRail firmware. Instead of utilizing secure hashing algorithms or encrypted storage mechanisms for sensitive authentication data, the affected firmware versions store passwords in plaintext format. This architectural weakness violates fundamental security principles for credential management in enterprise infrastructure systems.

Dell VxRail is a hyperconverged infrastructure (HCI) solution that integrates VMware vSphere software with Dell EMC PowerEdge servers. Given its role as a cornerstone of virtualized data center environments, the exposure of credentials on these systems could have cascading effects across the entire virtualized infrastructure stack.

The attack requires local access and high privileges, which somewhat limits the attack surface. However, in scenarios where an attacker has already gained initial access to a VxRail node—whether through a separate vulnerability, insider threat, or compromised service account—this vulnerability provides a straightforward path to credential harvesting.

Root Cause

The root cause is classified under CWE-256 (Plaintext Storage of a Password) and CWE-522 (Insufficiently Protected Credentials). The VxRail firmware fails to implement proper cryptographic protection for stored passwords, leaving authentication credentials readable in their original form. This represents a deviation from security best practices that mandate the use of strong, one-way hashing functions with salts for credential storage, or alternatively, secure secrets management solutions for credentials that must be retrievable.

Attack Vector

Exploitation requires local access to an affected VxRail appliance with high-level privileges. An attacker meeting these prerequisites could:

1. Access the file system or configuration storage where credentials are maintained
2. Locate password files or configuration databases containing authentication data
3. Read plaintext passwords directly without needing to perform cryptographic attacks
4. Leverage harvested credentials for lateral movement to other infrastructure components

The local access requirement and high privilege prerequisite act as mitigating factors, but these barriers are not insurmountable in real-world attack scenarios. Malicious insiders, supply chain compromises, or attackers who have already established a foothold on the network through other means could exploit this vulnerability effectively.

Detection Methods for CVE-2025-21111

Indicators of Compromise

• Unusual file access patterns to configuration files or credential storage locations on VxRail nodes
• Unexpected privilege escalation activities or authentication attempts using service accounts
• Unauthorized access to VxRail management interfaces from unexpected sources
• Evidence of credential harvesting tools or scripts executed on VxRail systems

Detection Strategies

• Implement file integrity monitoring on VxRail appliances to detect unauthorized access to sensitive configuration files
• Enable comprehensive audit logging for privileged operations and file system access on all VxRail nodes
• Monitor for anomalous authentication patterns that may indicate use of harvested credentials across the infrastructure
• Deploy endpoint detection and response (EDR) solutions capable of identifying credential access and exfiltration behaviors

Monitoring Recommendations

• Establish baseline behavior profiles for privileged accounts accessing VxRail systems and alert on deviations
• Configure SIEM correlation rules to identify sequential access patterns indicating credential theft and lateral movement
• Implement alerting for bulk file reads or exports from VxRail configuration directories
• Monitor network traffic for unusual data transfers originating from VxRail management interfaces

How to Mitigate CVE-2025-21111

Immediate Actions Required

• Review the Dell Security Advisory DSA-2025-025 and apply the recommended firmware update immediately
• Conduct an inventory of all Dell VxRail appliances and identify systems running vulnerable firmware versions 8.0.000 through 8.0.311
• Restrict local access to VxRail nodes and review privileged account assignments to minimize exposure
• After patching, rotate all credentials that may have been stored on affected systems to invalidate any potentially compromised authentication data

Patch Information

Dell has released a security update addressing this vulnerability as documented in security advisory DSA-2025-025. Organizations should upgrade affected VxRail appliances to firmware versions newer than 8.0.311 to remediate this vulnerability. The update is available through Dell's support portal and should be applied following your organization's change management procedures.

Consult the Dell Security Update for VxRail for specific upgrade instructions and version compatibility information.

Workarounds

• Implement strict access controls and network segmentation to limit local access to VxRail appliances until patching is complete
• Enable enhanced audit logging on all VxRail nodes to maintain visibility into any potential exploitation attempts
• Consider implementing privileged access management (PAM) solutions to control and monitor administrative access to VxRail infrastructure
• Ensure all VxRail management interfaces are isolated on dedicated management networks with strict access policies

# Example: Verify current VxRail firmware version
# Run from VxRail Manager or ESXi host shell
esxcli software vib list | grep -i vxrail

# Check for versions between 8.0.000 and 8.0.311
# Affected systems should be prioritized for patching