CVE-2025-52647
📋 TL;DR
BigFix WebUI is vulnerable to Host Header Poisoning attacks where attackers can manipulate HTTP Host headers to redirect users to malicious sites or bypass security controls. This affects organizations using BigFix WebUI for endpoint management and patching.
💻 Affected Systems
- HCL BigFix WebUI
⚠️ 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 users to phishing sites, steal credentials via malicious redirects, or bypass authentication mechanisms by poisoning cache or password reset links.
Likely Case
Attackers could perform phishing attacks by redirecting users to malicious domains that appear legitimate, potentially leading to credential theft.
If Mitigated
With proper input validation and security headers, the risk is reduced to minimal impact with no data compromise.
🎯 Exploit Status
Exploitation requires network access to the WebUI and ability to send crafted HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to HCL advisory KB0124562 for specific patched versions
Vendor Advisory: https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0124562
Restart Required: Yes
Instructions:
1. Review HCL advisory KB0124562. 2. Download and apply the latest BigFix WebUI patch from HCL. 3. Restart the BigFix WebUI service. 4. Verify the fix is applied.
🔧 Temporary Workarounds
Configure Reverse Proxy Validation
allConfigure reverse proxy or load balancer to validate and sanitize Host headers before forwarding to BigFix WebUI.
Implement Web Application Firewall Rules
allDeploy WAF rules to detect and block malicious Host header manipulation attempts.
🧯 If You Can't Patch
- Restrict network access to BigFix WebUI to trusted IP addresses only
- Implement strict input validation at network perimeter devices
🔍 How to Verify
Check if Vulnerable:
Send HTTP request with manipulated Host header to BigFix WebUI and check if response reflects the malicious host value.Check Version:
Check BigFix WebUI version via administrative interface or configuration filesVerify Fix Applied:
After patching, test with manipulated Host headers to confirm they are rejected or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual Host header values in web server logs
- Multiple failed authentication attempts with varied Host headers
Network Indicators:
- HTTP requests with suspicious Host header patterns
- Traffic to BigFix WebUI with non-standard hostnames
SIEM Query:
source="webui_access.log" | search "Host: *malicious*" OR "Host: *suspicious*"