If REST API is enabled, the Junos OS login credentials are vulnerable to brute force attacks. The high default connection limit of the REST API may allow an attacker to brute-force passwords using advanced scripting techniques. Additionally, administrators who do not enforce a strong password policy can increase the likelihood of success from brute force attacks. Affected releases are Juniper Networks Junos OS: 14.1X53 versions prior to 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S3; 15.1X49 versions prior to 15.1X49-D160; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D495, 15.1X53-D591, 15.1X53-D69; 16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S3; 16.1X65 versions prior to 16.1X65-D49; 16.2 versions prior to 16.2R2-S7; 17.1 versions prior to 17.1R2-S10, 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S2; 17.4 versions prior to 17.4R1-S6, 17.4R2-S2; 18.1 versions prior to 18.1R2-S4, 18.1R3-S1; 18.2 versions prior to 18.2R1-S5; 18.2X75 versions prior to 18.2X75-D30; 18.3 versions prior to 18.3R1-S1.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Junos | Juniper | 14.1x53 (including) | 14.1x53-d49 (excluding) |
| Junos | Juniper | 15.1 (including) | 15.1f6-s12 (excluding) |
| Junos | Juniper | 15.1x49 (including) | 15.1x49-d160 (excluding) |
| Junos | Juniper | 15.1x53 (including) | 15.1x53-d236 (excluding) |
| Junos | Juniper | 16.1 (including) | 16.1r3-s10 (excluding) |
| Junos | Juniper | 16.1x65 (including) | 16.1x65-d49 (excluding) |
| Junos | Juniper | 16.2 (including) | 16.2r2-s7 (excluding) |
| Junos | Juniper | 17.1 (including) | 17.1r2-s10 (excluding) |
| Junos | Juniper | 17.2 (including) | 17.2r1-s8 (excluding) |
| Junos | Juniper | 17.3 (including) | 17.3r3-s2 (excluding) |
| Junos | Juniper | 17.4 (including) | 17.4r1-s6 (excluding) |
| Junos | Juniper | 18.1 (including) | 18.1r2-s4 (excluding) |
| Junos | Juniper | 18.2 (including) | 18.2r1-s5 (excluding) |
| Junos | Juniper | 18.2x75 (including) | 18.2x75-d30 (excluding) |
| Junos | Juniper | 18.3 (including) | 18.3r1-s1 (excluding) |
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]