CVE-2024-38488: Dell RecoverPoint Auth Bypass Flaw

CVE-2024-38488 Overview

Dell RecoverPoint for Virtual Machines 6.0.x contains an Improper Restriction of Excessive Authentication Attempts vulnerability (CWE-307) that allows network attackers to perform brute force or dictionary attacks against the RecoverPoint login form. Successful exploitation can lead to complete system compromise by enabling attackers to systematically brute-force the passwords of valid users in an automated manner without any rate limiting or lockout mechanisms.

Critical Impact

This vulnerability allows unauthenticated network attackers to compromise user credentials through automated brute force attacks, potentially leading to complete system takeover of Dell RecoverPoint for Virtual Machines environments.

Affected Products

• Dell RecoverPoint for Virtual Machines 6.0 SP1
• Dell RecoverPoint for Virtual Machines 6.0 SP1_P1
• Dell RecoverPoint for Virtual Machines 6.0.x series

Discovery Timeline

• 2024-12-13 - CVE-2024-38488 published to NVD
• 2025-02-04 - Last updated in NVD database

Technical Details for CVE-2024-38488

Vulnerability Analysis

This vulnerability stems from the lack of proper authentication attempt restrictions in Dell RecoverPoint for Virtual Machines. The login form fails to implement adequate protections against repeated authentication attempts, creating a significant security gap. Without mechanisms such as account lockout policies, CAPTCHA challenges, or rate limiting, the system remains vulnerable to automated credential attacks.

The network-accessible nature of this vulnerability means that any attacker with network access to the RecoverPoint management interface can launch attacks without requiring any prior authentication or user interaction. The absence of authentication safeguards allows attackers to systematically test large volumes of password combinations against known or enumerated usernames.

Root Cause

The root cause is the improper restriction of excessive authentication attempts (CWE-307). The RecoverPoint login functionality does not enforce limits on the number of failed authentication attempts, nor does it implement any form of progressive delays or temporary lockouts after multiple failed login attempts. This design flaw allows unlimited authentication attempts against valid user accounts.

Attack Vector

Attackers can exploit this vulnerability by targeting the RecoverPoint web login interface from anywhere on the network. The attack methodology involves:

1. Identifying or enumerating valid usernames on the RecoverPoint system
2. Using automated tools to rapidly submit authentication requests with different password combinations
3. Systematically testing passwords from common password lists or custom dictionaries
4. Gaining unauthorized access once valid credentials are discovered

Once valid credentials are obtained, attackers gain full access to the RecoverPoint management console, potentially allowing them to manipulate backup and recovery operations, access protected data, or pivot to other systems in the environment.

Detection Methods for CVE-2024-38488

Indicators of Compromise

• High volume of failed authentication attempts from single or multiple IP addresses against RecoverPoint login portal
• Unusual login patterns including rapid successive authentication requests
• Successful logins from unexpected geographic locations or IP addresses following periods of failed attempts
• Authentication logs showing dictionary-style password patterns being tested

Detection Strategies

• Implement log monitoring for RecoverPoint authentication events and alert on anomalous patterns
• Deploy network-based intrusion detection systems (IDS) to identify brute force traffic patterns targeting the RecoverPoint interface
• Use SIEM correlation rules to detect multiple failed logins followed by successful authentication
• Monitor for automated tool signatures in HTTP request headers targeting the login endpoint

Monitoring Recommendations

• Enable verbose authentication logging on RecoverPoint for Virtual Machines systems
• Configure alerts for failed login thresholds (e.g., more than 5 failures in 5 minutes)
• Implement network flow analysis to detect high-frequency connections to the RecoverPoint management port
• Review authentication logs regularly for signs of credential stuffing or brute force activity

How to Mitigate CVE-2024-38488

Immediate Actions Required

• Apply the security update provided by Dell as documented in DSA-2024-429
• Restrict network access to the RecoverPoint management interface using firewall rules or network segmentation
• Implement strong, unique passwords for all RecoverPoint user accounts
• Enable multi-factor authentication if available for RecoverPoint access
• Audit existing user accounts and remove any unnecessary privileged access

Patch Information

Dell has released a security update to address this vulnerability. Organizations should refer to Dell Security Advisory DSA-2024-429 for detailed patch information and installation instructions. The advisory covers multiple third-party component vulnerabilities including this authentication bypass issue.

Workarounds

• Place RecoverPoint management interfaces behind a VPN or jump host to reduce exposure
• Implement IP whitelisting to restrict access to known administrator IP addresses
• Deploy a web application firewall (WAF) in front of RecoverPoint to detect and block brute force attempts
• Configure network-level rate limiting for connections to the RecoverPoint management port
• Use network segmentation to isolate RecoverPoint infrastructure from untrusted network zones

# Example: Restrict access to RecoverPoint management interface using iptables
# Allow only trusted administrator subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Example: Rate limit connections to management port
iptables -A INPUT -p tcp --dport 443 -m state --state NEW -m recent --set
iptables -A INPUT -p tcp --dport 443 -m state --state NEW -m recent --update --seconds 60 --hitcount 10 -j DROP