CVE-2024-40684: IBM Log Analysis Auth Bypass Flaw

CVE-2024-40684 Overview

CVE-2024-40684 affects IBM Operations Analytics - Log Analysis (formerly IBM SmartCloud Analytics - Log Analysis). The product does not enforce strong password requirements by default. This weak password policy enables attackers to compromise user accounts more easily through brute-force or dictionary attacks. The issue is classified under [CWE-521: Weak Password Requirements].

The vulnerability affects multiple versions across the 1.3.5.x through 1.3.8.x release branches. While the flaw does not directly leak data or grant code execution, it materially lowers the barrier to account takeover against network-accessible deployments.

Critical Impact

Attackers can compromise user accounts through credential-guessing attacks because IBM Operations Analytics - Log Analysis does not require strong passwords by default.

Affected Products

• IBM Operations Analytics - Log Analysis 1.3.5.0, 1.3.5.1, 1.3.5.2, 1.3.5.3
• IBM Operations Analytics - Log Analysis 1.3.6.0, 1.3.6.1, 1.3.7.0, 1.3.7.1, 1.3.7.2
• IBM Operations Analytics - Log Analysis 1.3.8.0, 1.3.8.1, 1.3.8.2, 1.3.8.3, 1.3.8.4

Discovery Timeline

• 2026-05-27 - CVE-2024-40684 published to NVD
• 2026-05-27 - Last updated in NVD database

Technical Details for CVE-2024-40684

Vulnerability Analysis

IBM Operations Analytics - Log Analysis ships with a default password policy that does not enforce sufficient complexity, length, or strength criteria. As a result, account holders can set passwords that are trivial to guess. Attackers targeting exposed instances can iterate through common password lists or perform credential-stuffing attacks against authentication endpoints.

The vulnerability is remotely exploitable across the network without prior authentication or user interaction, though the attack complexity is elevated because success depends on guessing valid credentials. The impact is confidentiality-focused: a successful guess yields access to logs and analytics data that often include sensitive operational telemetry.

IBM Operations Analytics - Log Analysis is typically deployed as a centralized log aggregation platform. Compromise of a user account can expose audit logs, application traces, and security events from connected systems, expanding the blast radius beyond the appliance itself.

Root Cause

The root cause is an insecure default configuration. The product does not enforce password complexity rules such as minimum length, character class diversity, or rejection of common dictionary entries. This corresponds to [CWE-521: Weak Password Requirements], where authentication controls are weakened by absent or permissive password policies.

Attack Vector

An unauthenticated attacker with network access to the Log Analysis web interface attempts to authenticate using common, weak, or previously breached passwords. Because the product accepts weak passwords during account creation or password change, valid user accounts may be protected only by short or guessable strings. Successful authentication grants read access to indexed log data and analytics dashboards.

No verified public exploit code is available for this issue. Refer to the IBM Support Page for vendor guidance.

Detection Methods for CVE-2024-40684

Indicators of Compromise

• Repeated failed authentication attempts followed by a successful login from the same source IP against the Log Analysis interface.
• Successful logins from unusual geographic locations or outside business hours for administrative accounts.
• New or modified dashboards, saved searches, or exports performed shortly after first-time logins from unrecognized sources.

Detection Strategies

• Enable authentication audit logging on IBM Operations Analytics - Log Analysis and forward events to a centralized SIEM for correlation.
• Build detection rules that alert on brute-force patterns: high ratios of failed-to-successful logins per account or source IP within a short window.
• Periodically audit existing user passwords against a known-weak-password list and flag accounts that match.

Monitoring Recommendations

• Monitor UserManagement and authentication log streams for anomalous login velocity and lockout events.
• Track session creation events and correlate them with source IP reputation feeds.
• Alert on privileged account logins that lack multi-factor authentication enforcement.

How to Mitigate CVE-2024-40684

Immediate Actions Required

• Apply the remediation guidance published on the IBM Support Page for CVE-2024-40684.
• Force a password reset for all user accounts and require strong passwords meeting current NIST SP 800-63B guidance.
• Restrict network access to the Log Analysis management interface to trusted administrative networks only.
• Enable account lockout thresholds to slow credential-guessing attacks.

Patch Information

IBM has published remediation guidance for affected versions of IBM Operations Analytics - Log Analysis. Administrators should review the IBM Support Page for fix availability and apply the recommended updates or configuration changes for versions 1.3.5.0 through 1.3.8.4.

Workarounds

• Enforce strong password policies at the directory service layer (LDAP or Active Directory) if Log Analysis is integrated with external authentication.
• Place the Log Analysis interface behind a reverse proxy or VPN that enforces multi-factor authentication.
• Disable or remove unused local accounts to reduce the credential attack surface.
• Rotate credentials for any account suspected of using a weak password and audit recent login activity.