CVE-2024-38316
📋 TL;DR
IBM Aspera Shares versions 1.9.0 through 1.10.0 PL6 have an email rate limiting vulnerability that allows authenticated users to send excessive emails. This could lead to email flooding attacks or denial of service conditions affecting email infrastructure. Organizations using these vulnerable versions are affected.
💻 Affected Systems
- IBM Aspera Shares
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious insider could flood email servers with massive volumes of emails, causing email system outages, overwhelming mail queues, and potentially disrupting business communications.
Likely Case
An authenticated user could abuse the email functionality to send spam-like volumes of emails, potentially triggering email server rate limiting or causing temporary email delivery issues.
If Mitigated
With proper monitoring and email server rate limiting, impact would be limited to temporary email delays and detectable anomalous activity.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple - just sending repeated email requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply IBM Aspera Shares 1.10.0 PL7 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7182490
Restart Required: Yes
Instructions:
1. Download IBM Aspera Shares 1.10.0 PL7 or later from IBM Fix Central. 2. Backup current configuration. 3. Stop Aspera Shares service. 4. Apply the update following IBM's installation guide. 5. Restart Aspera Shares service. 6. Verify functionality.
🔧 Temporary Workarounds
Implement Email Server Rate Limiting
allConfigure email server to limit emails per user/hour to prevent flooding
Restrict Email Permissions
allLimit which authenticated users have email sending capabilities in Aspera Shares
🧯 If You Can't Patch
- Implement strict monitoring of email sending patterns and alert on anomalies
- Configure network-level email rate limiting at the mail server or firewall
🔍 How to Verify
Check if Vulnerable:
Check Aspera Shares version via admin console or configuration files. If version is between 1.9.0 and 1.10.0 PL6 inclusive, system is vulnerable.Check Version:
Check Aspera Shares web interface Admin section or examine installation directory version filesVerify Fix Applied:
Verify version is 1.10.0 PL7 or later. Test email functionality to ensure it works but rate limiting is enforced.📡 Detection & Monitoring
Log Indicators:
- Unusually high frequency of email sending events from single user accounts in Aspera Shares logs
- Multiple email sending requests within short timeframes
Network Indicators:
- High volume of SMTP traffic originating from Aspera Shares server
- Spike in email traffic patterns
SIEM Query:
source="aspera_shares" AND event_type="email_send" | stats count by user, _time span=1h | where count > threshold