SAP NetWeaver AS Java allows an unauthenticated attacker to brute force the login functionality in order to identify the legitimate user IDs. This has an impact on confidentiality but not on integrity or availability.
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame, making it more susceptible to brute force attacks.
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.
Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]