Linksys EtherFast Cable/DSL BEFSR11, BEFSR41 and BEFSRU31 with the firmware 1.42.7 upgrade installed opens TCP port 5678 for remote administration even when the Block WAN and Remote Admin options are disabled, which allows remote attackers to gain access.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Befsr11 | Linksys | 1.42.7 (including) | 1.42.7 (including) |
| Befsr41 | Linksys | 1.42.7 (including) | 1.42.7 (including) |
| Befsru31 | Linksys | 1.42.7 (including) | 1.42.7 (including) |