CVE-2025-22273: Allocation of Resources Without Limits or Throttling

🚨 Critical Security Vulnerability

🆔 CVE-2025-22273

💣 CVSS Score: 9.3

📅 Published Date: February 28, 2025

⚠️ Details:

The application does not limit the number or frequency of user interactions, such as the number of incoming requests. At the `/EPMUI/VfManager.asmx/ChangePassword` endpoint, it is possible to perform a brute force attack on the current password in use.
This issue affects CyberArk Endpoint Privilege Manager in SaaS version 24.7.1. The status of other versions is unknown. After multiple attempts to contact the vendor, no response was received.

🛠 References:

🔗 National Institute of Standards and Technology (NIST): https://lnkd.in/ehcSfirX

Practice Verified Codes and Commands

1. Brute Force Simulation with Hydra:

Use Hydra to simulate a brute force attack on the vulnerable endpoint:

hydra -l admin -P /path/to/password/list target.com http-post-form "/EPMUI/VfManager.asmx/ChangePassword:username=^USER^&password=^PASS^:Invalid password"

2. Rate Limiting Test with Apache Benchmark:

Test the endpoint for rate limiting:

ab -n 1000 -c 10 http://target.com/EPMUI/VfManager.asmx/ChangePassword

3. Log Analysis for Suspicious Activity:

Check server logs for unusual activity:

grep "POST /EPMUI/VfManager.asmx/ChangePassword" /var/log/apache2/access.log

4. Patch Verification:

Verify if the patch is applied by checking the version:

curl -I http://target.com/EPMUI/VfManager.asmx | grep "Server"

5. Firewall Rule to Mitigate Brute Force:

Add a firewall rule to limit requests to the endpoint:

iptables -A INPUT -p tcp --dport 80 -m limit --limit 10/min -j ACCEPT

What Undercode Say

The CVE-2025-22273 vulnerability highlights a critical flaw in resource allocation and throttling mechanisms, particularly in CyberArk Endpoint Privilege Manager. This issue allows attackers to exploit the `/EPMUI/VfManager.asmx/ChangePassword` endpoint for brute force attacks, potentially compromising user credentials.

To mitigate such vulnerabilities, it is essential to implement robust rate-limiting mechanisms, monitor server logs for suspicious activity, and apply patches promptly. Tools like Hydra and Apache Benchmark can be used to simulate attacks and test defenses. Additionally, firewall rules can help restrict excessive requests to sensitive endpoints.

For further reading, refer to the NIST reference provided in the article. Always ensure your systems are up-to-date and follow best practices for cybersecurity.

Useful Commands:

• Linux Log Monitoring:

  tail -f /var/log/syslog
  

• Windows Event Logs:

  Get-EventLog -LogName Security -Newest 50
  

• Network Traffic Analysis:

  tcpdump -i eth0 port 80
  

• Patch Management:

  sudo apt update && sudo apt upgrade
  

Stay vigilant and proactive in securing your systems against such vulnerabilities.

Reference:

• NIST: https://lnkd.in/ehcSfirX

References:

initially reported by: https://www.linkedin.com/posts/err0r-secur1ty_saas-activity-7302661362739040258-kMts – Hackers Feeds
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