An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From the limited configuration shell, it is possible to set the malicious gdb_debug_server variable. As a result, after a reboot, the device downloads and executes malicious scripts from an attacker-defined host.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ht801_firmware | Grandstream | * | 1.0.29.8 (excluding) |
References
- http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/
- http://firmware.grandstream.com/BETA/Release_Note_HT80x_1.0.29.8.pdf
- http://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
- https://www.secforce.com/blog/exploiting-grandstream-ht801-ata-cve-2021-37748-cve-2021-37915/