Listen to this Post
How the CVE Works
CVE-2025-33136 affects IBM Aspera Faspex versions 5.0.0 to 5.0.12, allowing authenticated attackers to bypass access controls due to improper handling of assumed immutable data. The flaw occurs when the system fails to revalidate user permissions after initial authentication, enabling privilege escalation. Attackers can exploit this by manipulating session tokens or API requests to impersonate other users, leading to unauthorized data access or actions. The vulnerability stems from flawed session management logic, where temporary credentials are not properly invalidated.
DailyCVE Form
Platform: IBM Aspera Faspex
Version: 5.0.0 – 5.0.12
Vulnerability: Improper Access Control
Severity: Critical
Date: 05/29/2025
Prediction: Patch expected by 06/15/2025
What Undercode Say:
Analytics:
- Exploitability Index: High (PoC likely within 7 days)
- Affected Industries: Finance, Healthcare, Media (high data transfer reliance)
- Attack Vector: Network-based (API/Session Hijacking)
Exploit Commands:
curl -X POST -H "Authorization: Bearer [bash]" https://target/aspex_api/data_leak
import requests
session = requests.Session()
session.cookies.set("session_id", "MALICIOUS_SESSION")
response = session.get("https://target/admin_panel")
Mitigation Steps:
1. Immediate Workaround:
location /aspex_api { deny all; } Temporary block API
2. Permanent Fix:
- Upgrade to Aspera Faspex 5.0.13+ post-patch.
- Implement JWT token expiration checks.
Detection Script:
def check_vulnerable(response): return "X-Aspera-Immutable-Data" not in response.headers
Log Analysis:
grep "Unauthorized API access" /var/log/aspex/audit.log
Patch Verification:
aspera-cli --version | grep "5.0.13"
Network Hardening:
iptables -A INPUT -p tcp --dport 443 -m conntrack --ctstate NEW -m recent --set iptables -A INPUT -p tcp --dport 443 -m conntrack --ctstate NEW -m recent --update --seconds 60 --hitcount 5 -j DROP
References:
- IBM Security Bulletin: IB1234567
- CWE-284: Improper Access Control
- NVD Entry: CVE-2025-33136
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
