CVE-2025-62004
📋 TL;DR
A local, authenticated attacker can log into BullWall Server Intrusion Protection systems during the brief window after boot when login services are running but SIP MFA services haven't started yet. The vulnerability allows bypassing multi-factor authentication because sessions established before SIP MFA initializes are not retroactively enforced. This affects BullWall SIP versions 4.6.0.0, 4.6.0.6, 4.6.0.7, and 4.6.1.4.
💻 Affected Systems
- BullWall Server Intrusion Protection (SIP)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized administrative access to the intrusion protection system, potentially disabling security controls, exfiltrating sensitive data, or using the system as a pivot point to attack other network resources.
Likely Case
Privileged users or attackers with stolen credentials bypass MFA to gain unauthorized access to the security management console during system reboots or maintenance windows.
If Mitigated
Attackers are blocked by compensating controls like network segmentation, strict access policies, or monitoring that detects unusual login patterns during startup windows.
🎯 Exploit Status
Exploitation requires valid credentials and timing access during system startup. No public exploit code is mentioned in the CVE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-352-01.json
Restart Required: No
Instructions:
Monitor BullWall vendor communications for patches. The vendor plans to improve detection method documentation but no specific patch is mentioned in the CVE.
🔧 Temporary Workarounds
Schedule System Reboots During Off-Hours
allReboot systems during maintenance windows when legitimate users are not expected to log in, reducing the attack window.
Implement Network Access Controls
allRestrict access to BullWall management interfaces to specific trusted IP addresses or VLANs to limit potential attackers.
🧯 If You Can't Patch
- Implement strict monitoring for login attempts during system startup periods and alert on any successful authentications.
- Enforce additional authentication layers (like VPN or jump hosts) before accessing BullWall management interfaces.
🔍 How to Verify
Check if Vulnerable:
Check BullWall SIP version against affected versions: 4.6.0.0, 4.6.0.6, 4.6.0.7, 4.6.1.4. Monitor system logs for login events occurring shortly after boot timestamps.Check Version:
Check BullWall administration console or documentation for version information (specific command not provided in CVE).Verify Fix Applied:
After vendor patch is released, verify version is updated beyond affected versions and test that MFA is enforced immediately after system boot.📡 Detection & Monitoring
Log Indicators:
- Login events timestamped within minutes of system boot/reboot events
- Successful authentication events without corresponding MFA challenge logs during startup window
Network Indicators:
- Management interface access from unexpected IP addresses during system startup periods
SIEM Query:
source="bullwall" AND (event_type="login" OR event_type="authentication") | where _time - system_boot_time < 300