Description
A vulnerability, which was classified as critical, was found in LB-LINK BL-AC1900, BL-AC2100_AZ3, BL-AC3600, BL-AX1800, BL-AX5400P and BL-WR9000 up to 20250702. Affected is the function reboot/restore of the file /cgi-bin/lighttpd.cgi of the component Web Interface. The manipulation leads to improper authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| LB-LINK | BL-AC1900 | 20250702 | — |
| LB-LINK | BL-AC2100_AZ3 | 20250702 | — |
| LB-LINK | BL-AC3600 | 20250702 | — |
| LB-LINK | BL-AX1800 | 20250702 | — |
| LB-LINK | BL-AX5400P | 20250702 | — |
| LB-LINK | BL-WR9000 | 20250702 | — |
References
- VDB-316272 | LB-LINK BL-WR9000 Web Interface lighttpd.cgi restore improper authentication vdb-entry technical-description
- VDB-316272 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #608018 | Blink BL-AX5400P V1.0.19、BL-AX1800 V1.0.19、BL-AC3600 V1.0.22、BL-WR9000 V2.4.9、BL-AC1900 V1.0.2、BL-AC2100_AZ3 V1.0.4 BL-AX5400P V1.0.19、BL-AX1800 V1.0.19、BL-AC3600 V1.0.22、BL-WR9000 V2.4.9、BL-AC1900 V1.0.2、BL-AC2100_AZ3 V1.0.4 Incorre third-party-advisory
- https://github.com/waiwai24/0101/blob/main/CVEs/Blink/Privilege_Control_Defect_in_Blink_Router_Web_Interface_Permits_Arbitrary_Sensitive_Operation_Execution.md related
- https://github.com/waiwai24/0101/blob/main/CVEs/Blink/Privilege_Control_Defect_in_Blink_Router_Web_Interface_Permits_Arbitrary_Sensitive_Operation_Execution.md#poc exploit