CVE-2024-46957
📋 TL;DR
This vulnerability in Mellium XMPP library allows attackers to spoof responses when predictable IDs are used, because the library fails to verify stanza types. This affects any application using Mellium XMPP library versions 0.0.1 through 0.21.4 for XMPP communication.
💻 Affected Systems
- Mellium XMPP library (mellium.im/xmpp)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of XMPP sessions allowing message interception, impersonation, and potential data exfiltration or manipulation of XMPP communications.
Likely Case
Session hijacking, message spoofing, and unauthorized access to XMPP conversations and resources.
If Mitigated
Limited impact if proper ID randomization is implemented and network segmentation restricts access to XMPP services.
🎯 Exploit Status
Exploitation requires network access to XMPP service and predictable ID patterns. No authentication needed for initial attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.22.0
Vendor Advisory: https://mellium.im/cve/cve-2024-46957/
Restart Required: Yes
Instructions:
1. Update Mellium XMPP library to version 0.22.0 or later. 2. Rebuild and redeploy any applications using the library. 3. Restart XMPP services to apply the fix.
🔧 Temporary Workarounds
Implement random ID generation
allModify application code to use cryptographically secure random IDs for XMPP stanzas instead of predictable patterns
// Example Go code: use crypto/rand for ID generation
import "crypto/rand"
id := make([]byte, 16)
rand.Read(id)
Network segmentation
linuxRestrict network access to XMPP services to trusted networks only
# Example iptables rule
iptables -A INPUT -p tcp --dport 5222 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 5222 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with XMPP services
- Monitor XMPP traffic for unusual patterns or unexpected response messages
🔍 How to Verify
Check if Vulnerable:
Check Go module dependencies for mellium.im/xmpp version. If version is between 0.0.1 and 0.21.4 inclusive, the system is vulnerable.Check Version:
grep 'mellium.im/xmpp' go.mod || find ./vendor -name 'go.mod' -exec grep -l 'mellium.im/xmpp' {} \; -exec grep 'mellium.im/xmpp' {} \;Verify Fix Applied:
Verify that mellium.im/xmpp version is 0.22.0 or higher in go.mod or vendor dependencies.📡 Detection & Monitoring
Log Indicators:
- Unexpected response messages in XMPP logs
- Multiple failed authentication attempts followed by successful spoofed responses
- Unusual stanza ID patterns
Network Indicators:
- Predictable XMPP stanza IDs in network captures
- Unexpected response traffic patterns
- Spoofed XMPP responses
SIEM Query:
source="xmpp.log" AND ("unexpected response" OR "spoofed" OR "invalid stanza")