Title

The Juniper router must be configured to enforce the limit of three consecutive invalid logon attempts after which time lock out the user account from accessing the device for 15 minutes. (Cat II impact)

Discussion

By limiting the number of failed login attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced.

Check Content

Review the router configuration to verify that it enforces the limit of three consecutive invalid logon attempts after which time it will lockout the user account from accessing the router for 15 minutes as shown in the example below. login { retry-options { tries-before-disconnect 3; lockout-period 15; } If the router is not configured to enforce the limit of three consecutive invalid logon attempts after which time it will lockout the user account from accessing the router for 15 minutes, this is a finding.

Fix Text

Configure the router to enforce the limit of three consecutive invalid logon attempts and lock out the user account from accessing the device for 15 minutes as shown in the example below. [edit system login] set retry-options tries-before-disconnect 3 set retry-options lockout-period 15

Additional Identifiers

Rule ID: SV-217311r879546_rule

Vulnerability ID: V-217311

Group Title: SRG-APP-000065-NDM-000214

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.