CVE-2024-2323 in API Manager
Summary
by MITRE • 10/20/2026
The RemoteUserStoreManagerService does not sufficiently validate password change attempts when the password history validation feature is enabled. This oversight allows an attacker to repeatedly attempt password guesses for a user account without being adequately restricted.
Exploiting this vulnerability enables an attacker to discover a user's password through brute force, leading to account impersonation. The success rate of such an attack is influenced by the complexity of the targeted user's password, with simpler passwords increasing the likelihood of compromise.
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Analysis
by VulDB Data Team • 10/20/2026
The RemoteUserStoreManagerService contains a critical authentication logic flaw that undermines the effectiveness of password history validation mechanisms. When this feature is enabled, administrators typically expect the system to prevent users from reusing recent passwords and to enforce strict policies regarding credential changes. However, the service fails to adequately validate or restrict repeated password change attempts for specific user accounts. This oversight creates a significant gap in access control logic, allowing an attacker who has obtained valid credentials for a target account to bypass intended security controls designed to limit brute force activity during authentication processes.
This vulnerability directly facilitates offline and online brute force attacks against user accounts. By exploiting the lack of sufficient rate limiting or lockout mechanisms tied to password change operations, an adversary can repeatedly submit credential guesses without triggering standard defensive responses such as temporary account locks or progressive delays. The operational impact is severe, as it effectively neutralizes protective measures intended to slow down automated guessing tools. Attackers can leverage this flaw to systematically test large volumes of potential passwords against a single target identity until the correct credentials are discovered.
The success probability of exploiting this vulnerability is heavily dependent on the entropy and complexity of the targeted user's password. Accounts protected by weak, common, or easily guessable passwords are at significantly higher risk of compromise compared to those with strong, complex passphrases. Once an attacker successfully identifies a valid password through this unrestricted guessing process, they gain full unauthorized access to the compromised account. This leads directly to identity impersonation, allowing the adversary to act as the legitimate user within the application environment.
From a classification perspective, this issue aligns closely with CWE-307 Improper Restriction of Excessive Authentication Attempts and CWE-287 Improper Authentication. The failure to enforce adequate limits on repeated login or credential modification attempts represents a fundamental breakdown in authentication security controls. In terms of the MITRE ATT&CK framework, this vulnerability supports techniques associated with Credential Access, specifically brute force attacks such as T1110. It also relates to persistence and privilege escalation vectors if the compromised account holds elevated privileges within the system architecture.
To mitigate this risk, immediate remediation should focus on implementing robust rate limiting policies that apply uniformly across all authentication-related endpoints, including password change services. Security controls must be configured to detect and block anomalous patterns of repeated failed attempts or rapid successive requests from a single source IP address or user session. Additionally, enforcing multi-factor authentication adds a critical layer of defense that remains effective even if passwords are compromised through brute force methods. Regular audits of identity management configurations should also verify that password history and complexity rules are correctly enforced at the service level without logical bypasses.