CVE-2024-12990
📋 TL;DR
This vulnerability allows attackers to redirect users to malicious websites by manipulating the 'nexturl' parameter on the admin verification page in Rebuild 3.8.6. It affects all users of the Rebuild software version 3.8.6 who access the admin verification functionality. The vulnerability can be exploited remotely without authentication.
💻 Affected Systems
- ruifang-tech Rebuild
⚠️ 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
Attackers could redirect administrators to phishing sites that steal credentials, leading to full system compromise.
Likely Case
Users are redirected to malicious sites for phishing, malware distribution, or credential harvesting.
If Mitigated
With proper URL validation and user awareness, impact is limited to inconvenience from unexpected redirects.
🎯 Exploit Status
Exploit requires crafting a malicious URL with the vulnerable parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to only allow relative URLs or trusted domains in the nexturl parameter.
Modify /user/admin-verify endpoint code to validate nexturl parameter
WAF Rule
allAdd web application firewall rule to block requests with external URLs in the nexturl parameter.
Add WAF rule: Block if nexturl contains http:// or https:// followed by non-localhost domain
🧯 If You Can't Patch
- Restrict access to the admin verification page using network controls or authentication
- Implement client-side warnings about external redirects
🔍 How to Verify
Check if Vulnerable:
Test by accessing /user/admin-verify?nexturl=http://evil.example.com and checking if redirect occurs.Check Version:
Check Rebuild version in application configuration or admin panel.Verify Fix Applied:
Test the same URL and verify it either blocks the request or redirects to a safe location.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /user/admin-verify with external URLs in parameters
- Unusual redirect patterns from admin pages
Network Indicators:
- Outbound connections to unexpected domains following admin page access
SIEM Query:
source="web_logs" AND uri="/user/admin-verify" AND (param="nexturl" AND value CONTAINS "http")