240 – Authentication mechanism absence or evasion - OTP
Description
During the registration process of a new user, it is necessary to confirm the 6-digit verification code sent to the associated cellular number, however, it is possible to evade this mechanism since this code is not validated, being valid any combination, even if it does not comply with the specified number of digits.
Impact
- Create unauthorized users of the system. - Impersonate users.
Recommendation
Validate on the server side that the code entered by the user, corresponds to the one generated by the system.
Threat
Unauthorized attacker from the Internet.
Expected Remediation Time
Score 4.0
Default score using CVSS 4.0. It may change depending on the context of the src.
Base 4.0
- Attack vector: N
- Attack complexity: L
- Attack Requirements: N
- Privileges required: N
- User interaction: N
- Confidentiality (VC): N
- Integrity (VI): L
- Availability (VA): N
- Confidentiality (SC): N
- Integrity (SI): N
- Availability (SA): N
Threat 4.0
- Exploit maturity: X