CVE-2024-37358
📋 TL;DR
Apache James email servers are vulnerable to denial of service attacks where attackers can abuse IMAP literals to cause unbounded memory allocation and excessive computations. This affects both authenticated and unauthenticated users, potentially crashing or severely degrading server performance. Organizations running vulnerable Apache James versions are at risk.
💻 Affected Systems
- Apache James
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service outage through resource exhaustion, making the email server unavailable to all users.
Likely Case
Severe performance degradation leading to service disruption and potential data loss for email services.
If Mitigated
Minimal impact with proper network controls and monitoring in place.
🎯 Exploit Status
Similar to CVE-2024-34055, requires IMAP access but no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.7.6 or 3.8.2
Vendor Advisory: https://lists.apache.org/thread/1pxsh11v5s3fkvhnqvkmlqwt3fgpcrqc
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download Apache James 3.7.6 or 3.8.2 from official Apache repository. 3. Stop the James service. 4. Replace the James installation with the patched version. 5. Restart the James service. 6. Verify service functionality.
🔧 Temporary Workarounds
Restrict IMAP Access
allLimit IMAP access to trusted networks only using firewall rules
Rate Limit IMAP Connections
allImplement connection rate limiting at network or application level
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Apache James servers
- Deploy web application firewall with IMAP protocol inspection capabilities
🔍 How to Verify
Check if Vulnerable:
Check Apache James version - if below 3.7.6 or 3.8.2, system is vulnerableCheck Version:
java -jar james-server.jar --versionVerify Fix Applied:
Verify version is 3.7.6 or 3.8.2 and test IMAP functionality📡 Detection & Monitoring
Log Indicators:
- Unusually large IMAP literal requests
- Memory allocation errors
- High CPU usage from IMAP processes
Network Indicators:
- Multiple IMAP connections with large payloads
- Abnormal IMAP command sequences
SIEM Query:
source="apache_james" AND (message="*IMAP*" OR message="*literal*") AND (message="*memory*" OR message="*allocation*")