CVE-2021-44207: Acclaim USAHERDS Auth Bypass Vulnerability

CVE-2021-44207 Overview

CVE-2021-44207 is a hardcoded credentials vulnerability affecting Acclaim USAHERDS through version 7.4.0.1. USAHERDS is an animal health and emergency management software system used by state agencies to track livestock and manage animal health programs. The application uses hard-coded credentials, which can allow an unauthenticated remote attacker to gain unauthorized access to the system if they can determine the credentials through reverse engineering or other means.

Critical Impact

This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Organizations using affected versions should prioritize immediate remediation.

Affected Products

• Acclaim USAHERDS versions through 7.4.0.1
• acclaimsystems usaherds (all versions up to and including 7.4.0.1)

Discovery Timeline

• 2021-12-21 - CVE-2021-44207 published to NVD
• 2025-11-10 - Last updated in NVD database

Technical Details for CVE-2021-44207

Vulnerability Analysis

This vulnerability is classified as CWE-798 (Use of Hard-coded Credentials), a significant security weakness that occurs when software contains hard-coded credentials such as passwords, cryptographic keys, or other authentication mechanisms embedded directly in the source code or configuration files.

In the case of Acclaim USAHERDS, the application embeds static credentials that cannot be easily changed by administrators. This design flaw creates a persistent vulnerability because even if the credentials are discovered, organizations cannot simply update them without a vendor-provided patch or update.

The network-accessible nature of this vulnerability means attackers can potentially exploit it remotely, though the attack complexity is elevated as the attacker must first discover or obtain the hard-coded credentials through methods such as reverse engineering the application binaries or analyzing network traffic.

Root Cause

The root cause of this vulnerability lies in insecure development practices where authentication credentials were embedded directly into the application code rather than using secure credential management approaches. Hard-coded credentials are particularly dangerous because:

1. They persist across all installations of the software
2. They cannot be rotated without vendor intervention
3. Once discovered, they compromise all affected deployments simultaneously
4. They may be easily extracted through binary analysis or decompilation

Attack Vector

The attack vector for CVE-2021-44207 is network-based. An attacker who has obtained the hard-coded credentials can authenticate to the USAHERDS application remotely without requiring any prior authentication or user interaction. Successful exploitation could lead to complete compromise of confidentiality, integrity, and availability of the affected system and its data.

Given that USAHERDS manages sensitive animal health data for state agencies, unauthorized access could potentially allow attackers to view, modify, or delete critical livestock tracking and emergency management records.

The vulnerability has been actively exploited in the wild, as evidenced by its inclusion in the CISA Known Exploited Vulnerabilities catalog. Additional technical details are available in the Mandiant Vulnerability Disclosure.

Detection Methods for CVE-2021-44207

Indicators of Compromise

• Unexpected authentication events to USAHERDS systems, particularly from unfamiliar IP addresses or during unusual hours
• Failed login attempts followed by successful authentication using credentials that match known hard-coded patterns
• Unusual data access patterns or bulk data exports from the USAHERDS application
• Network connections to USAHERDS services from external or unauthorized sources

Detection Strategies

• Implement network monitoring to detect authentication attempts to USAHERDS services from unauthorized sources
• Deploy application logging and monitor for authentication events, correlating with known legitimate user activity
• Use behavioral analytics to identify anomalous access patterns to livestock and animal health data
• Conduct regular audits of USAHERDS access logs to identify unauthorized access attempts

Monitoring Recommendations

• Enable verbose logging on all USAHERDS instances and forward logs to a centralized SIEM solution
• Implement network segmentation monitoring to detect lateral movement attempts after initial USAHERDS compromise
• Set up alerts for any administrative actions or configuration changes within the USAHERDS application
• Monitor for data exfiltration patterns, particularly large-scale access to animal health records

How to Mitigate CVE-2021-44207

Immediate Actions Required

• Contact Acclaim Systems to obtain the latest patched version of USAHERDS that addresses the hard-coded credentials issue
• Implement network access controls to restrict USAHERDS access to only authorized IP addresses and networks
• Deploy a web application firewall (WAF) or reverse proxy to add an additional authentication layer in front of USAHERDS
• Audit all existing access to USAHERDS instances to identify any potential unauthorized access that may have already occurred

Patch Information

Organizations should visit the Acclaim Systems website to obtain information about patched versions and upgrade procedures. Given the active exploitation status of this vulnerability, upgrading to a version newer than 7.4.0.1 that addresses the hard-coded credentials issue is critical.

Review the Mandiant vulnerability disclosure MNDT-2021-0012 for additional technical guidance and remediation information.

Workarounds

• Isolate USAHERDS systems behind a VPN or zero-trust network access solution to prevent direct internet exposure
• Implement network-level access controls using firewall rules to restrict access to known administrative IP addresses
• Deploy intrusion detection/prevention systems (IDS/IPS) to monitor for exploitation attempts
• Consider temporarily disabling remote access to USAHERDS until a patched version can be deployed

# Example firewall configuration to restrict USAHERDS access
# Limit access to specific trusted IP ranges only
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 192.168.0.0/16 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP