Improper Restriction of Authentication Attempts in cURL

## Summary: The authentication mechanism in cURL does not properly restrict the number of failed authentication attempts, allowing an attacker to brute-force credentials. This issue affects authentication-based requests and could lead to unauthorized access if an attacker successfully guesses a valid password. ## Affected Version: cURL version: [Specify version] Platform: [Specify OS and environment] (curl -V output: [Attach output]) ## Steps To Reproduce: Use a valid username but an incorrect password to make an authentication request via cURL: curl -u valid_user:wrong_password http://target-url.com Observe that there is no lockout or delay after multiple failed attempts. Automate the process using a brute-force script: for i in {1..1000}; do curl -u valid_user:password$i http://target-url.com; done If a correct password is found, the attacker gains unauthorized access. ## Supporting Material/References: [Attach logs or screenshots showing multiple failed attempts without any lockout] [Any relevant documentation that supports this claim] ## Impact: Allows brute-force attacks against user accounts. Potential unauthorized access leading to data breaches. Can be exploited remotely if authentication is exposed. ## Recommended Fix: Implement rate-limiting after multiple failed authentication attempts. Introduce CAPTCHA or multi-factor authentication (MFA). Enforce temporary account lockouts after a predefined number of failures. ## Severity: Critical 🚨 This vulnerability can be exploited remotely, leading to unauthorized access, making it a high-impact security risk ## Impact Allows brute-force attacks against user accounts. Potential unauthorized access leading to data breaches. Can be exploited remotely if authentication is exposed.