CVE-2024-27168
📋 TL;DR
CVE-2024-27168 is an authentication bypass vulnerability in Toshiba multifunction printers where hardcoded private keys are used for internal API authentication. Attackers who discover these keys can bypass authentication and access administrative interfaces. This affects specific Toshiba e-STUDIO and e-BRIDGE series multifunction printers.
💻 Affected Systems
- Toshiba e-STUDIO series multifunction printers
- Toshiba e-BRIDGE series multifunction printers
⚠️ 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 affected multifunction printers allowing attackers to access administrative functions, steal sensitive documents, modify device configurations, and potentially pivot to internal networks.
Likely Case
Unauthorized access to administrative interfaces leading to configuration changes, document theft, and potential device disruption.
If Mitigated
Limited impact if devices are properly segmented and administrative interfaces are restricted to internal management networks only.
🎯 Exploit Status
Exploitation requires knowledge of hardcoded keys but is straightforward once keys are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates specified in Toshiba advisory
Vendor Advisory: https://www.toshibatec.com/information/20240531_01.html
Restart Required: Yes
Instructions:
1. Identify affected models and current firmware versions. 2. Download firmware updates from Toshiba support portal. 3. Apply firmware updates following Toshiba's installation procedures. 4. Verify successful update and restart devices.
🔧 Temporary Workarounds
Network segmentation and access control
allRestrict network access to printer administrative interfaces
Disable unnecessary services
allDisable any unnecessary network services on affected printers
🧯 If You Can't Patch
- Isolate affected printers on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious access to printer administrative interfaces
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against Toshiba's advisory listCheck Version:
Check printer web interface or device information page for firmware versionVerify Fix Applied:
Verify firmware version has been updated to patched version specified in advisory📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to administrative interfaces
- Authentication bypass attempts
Network Indicators:
- Unusual traffic patterns to printer administrative ports
- Access from unexpected IP addresses
SIEM Query:
source_ip=printer_admin_interface AND (status_code=200 OR auth_bypass_pattern)🔗 References
- http://seclists.org/fulldisclosure/2024/Jul/1
- https://jvn.jp/en/vu/JVNVU97136265/index.html
- https://www.toshibatec.com/information/20240531_01.html
- https://www.toshibatec.com/information/pdf/information20240531_01.pdf
- http://seclists.org/fulldisclosure/2024/Jul/1
- https://jvn.jp/en/vu/JVNVU97136265/index.html
- https://www.toshibatec.com/information/20240531_01.html
- https://www.toshibatec.com/information/pdf/information20240531_01.pdf
