| Article No° | Product Name | Affected Version(s) |
|---|---|---|
| 2702547 | FL MGUARD CENTERPORT | < 8.9.0 |
| 2702820 | FL MGUARD CENTERPORT VPN-1000 | < 8.9.0 |
| 2702884 | FL MGUARD CORE TX | < 8.9.0 |
| 2702831 | FL MGUARD CORE TX VPN | < 8.9.0 |
| 2700967 | FL MGUARD DELTA TX/TX | < 8.9.0 |
| 2700968 | FL MGUARD DELTA TX/TX VPN | < 8.9.0 |
| 2700197 | FL MGUARD GT/GT | < 8.9.0 |
| 2700198 | FL MGUARD GT/GT VPN | < 8.9.0 |
| 2701274 | FL MGUARD PCI4000 | < 8.9.0 |
| 2701275 | FL MGUARD PCI4000 VPN | < 8.9.0 |
| 2701277 | FL MGUARD PCIE4000 | < 8.9.0 |
| 2701278 | FL MGUARD PCIE4000 VPN | < 8.9.0 |
| 2702139 | FL MGUARD RS2000 TX/TX-B | < 8.9.0 |
| 2700642 | FL MGUARD RS2000 TX/TX VPN | < 8.9.0 |
| 2701875 | FL MGUARD RS2005 TX VPN | < 8.9.0 |
| 2700634 | FL MGUARD RS4000 TX/TX | < 8.9.0 |
| 2702470 | FL MGUARD RS4000 TX/TX-M | < 8.9.0 |
| 2702259 | FL MGUARD RS4000 TX/TX-P | < 8.9.0 |
| 2200515 | FL MGUARD RS4000 TX/TX VPN | < 8.9.0 |
| 2701876 | FL MGUARD RS4004 TX/DTX | < 8.9.0 |
| 2701877 | FL MGUARD RS4004 TX/DTX VPN | < 8.9.0 |
| 2700640 | FL MGUARD SMART2 | < 8.9.0 |
| 2700639 | FL MGUARD SMART2 VPN | < 8.9.0 |
| 2903441 | TC MGUARD RS2000 3G VPN | < 8.9.0 |
| 1010464 | TC MGUARD RS2000 4G ATT VPN | < 8.9.0 |
| 2903588 | TC MGUARD RS2000 4G VPN | < 8.9.0 |
| 1010462 | TC MGUARD RS2000 4G VZW VPN | < 8.9.0 |
| 2903440 | TC MGUARD RS4000 3G VPN | < 8.9.0 |
| 1010463 | TC MGUARD RS4000 4G ATT VPN | < 8.9.0 |
| 2903586 | TC MGUARD RS4000 4G VPN | < 8.9.0 |
| 1010461 | TC MGUARD RS4000 4G VZW VPN | < 8.9.0 |
A denial of service of the HTTPS management interface of PHOENIX CONTACT FL MGUARD and TC MGUARD devices can be triggered by a larger number of unauthenticated HTTPS connections originating from different source IP’s. Configuring firewall limits for incoming connections cannot prevent the issue.
Mitigation
Don’t allow access to the HTTPS management interface from untrusted networks.
In the default configuration, the access is only allowed from internal interfaces.
Remediation
The vulnerability is fixed in firmware version 8.9.0. We strongly recommend all affected users to upgrade to this or a later version.
This vulnerability was discovered by Alpha Strike Labs GmbH, Berlin.
We kindly appreciate the coordinated disclosure of this vulnerability by the finder.
PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication.