An Improper Restriction of Excessive Authentication Attempts issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. There are no penalties for repeatedly entering incorrect passwords.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| 1763-l16awa_series_a | Rockwellautomation | * | 16.000 (including) |
| 1763-l16awa_series_b | Rockwellautomation | * | 16.000 (including) |
| 1763-l16bbb_series_a | Rockwellautomation | * | 16.000 (including) |
| 1763-l16bbb_series_b | Rockwellautomation | * | 16.000 (including) |
| 1763-l16bwa_series_a | Rockwellautomation | * | 16.000 (including) |
| 1763-l16bwa_series_b | Rockwellautomation | * | 16.000 (including) |
| 1763-l16dwd_series_a | Rockwellautomation | * | 16.000 (including) |
| 1763-l16dwd_series_b | Rockwellautomation | * | 16.000 (including) |
Common protection mechanisms include:
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]