Proper authentication responses
Summary
System responses to authentication failures must not indicate which part of the authentication was incorrect.
Description
Authentication forms are one of the most publicly accessible parts of an application, which makes them more susceptible to be attacked. Most authentication mechanisms require only a username and a password. If the responses to authentication attempts indicate which authentication parameter was incorrect, attackers may be able to obtain a list of valid usernames (user enumeration) that they can use in brute force attacks.
Supported In
This requirement is verified in following services
| Plan | Supported |
|---|---|
| Essential | 🔴 |
| Advanced | 🟢 |
References
- CWEâ„¢-203. Observable discrepancy
- PDPO-S1_5. Information to be generally available
- CMMC-AC_L2-3_1_8. Unsuccessful logon attempts
- CMMC-AC_L2-3_1_9. Privacy & security notices
- CMMC-AU_L2-3_3_4. Audit failure alerting
- ISA/IEC 62443-IAC-1_12. System use notification
- WASSEC-6_2_1_1. Authentication - Brute force
- ISSAF-T_19_2. Web application assessment - Global Countermeasures (server-side)
- ISSAF-V_12. Application security - Source code auditing (error handling)
- NIST 800-171-1_9. Provide privacy and security notices
- NIST 800-171-5_11. Obscure feedback of authentication information
- OWASP MASVS-AUTH-1. The app uses secure authentication and authorization protocols and follows the relevant best practices
- NIST CSF-PR_AA-03. Users, services, and hardware are authenticated
- NIST CSF-RS_MA-01. The incident response plan is executed in coordination with relevant third parties once an incident is declared
Vulnerabilities
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