CVE-2024-49827: IBM Concert Information Disclosure Flaw

CVE-2024-49827 Overview

CVE-2024-49827 is an information disclosure vulnerability affecting IBM Concert Software versions 1.0.0 through 1.1.0. The flaw stems from excessive data exposure, where the application returns sensitive information without proper filtering. Remote attackers can query the affected component over the network and retrieve data they should not access. The vulnerability requires no authentication and no user interaction, making it accessible to unauthenticated attackers with network reachability to the service. IBM has acknowledged the issue and published a security bulletin describing the affected versions and remediation guidance.

Critical Impact
Unauthenticated remote attackers can retrieve sensitive information from IBM Concert Software due to insufficient response filtering, with no privileges or user interaction required.

Affected Products

IBM Concert Software 1.0.0
IBM Concert Software 1.0.1 through 1.0.x
IBM Concert Software up to and including 1.1.0

Discovery Timeline

2025-08-18 - CVE-2024-49827 published to NVD
2025-08-21 - Last updated in NVD database

Technical Details for CVE-2024-49827

Vulnerability Analysis

The vulnerability is classified under [CWE-213] Exposure of Sensitive Information Due to Incompatible Policies. IBM Concert Software returns API responses that contain more data than the requesting context is authorized to receive. The server-side logic does not enforce field-level filtering before serializing objects to the client.

Attackers reach the vulnerable endpoints over the network using standard HTTP requests. Because the attack vector is network-based and requires no authentication, exploitation is straightforward against exposed instances. The disclosed data may include configuration details, internal identifiers, or other operational metadata maintained by Concert.

The vulnerability impacts confidentiality only. Integrity and availability of the affected system are not affected by this issue.

Root Cause

The root cause is missing response filtering in the application layer. Concert services serialize internal data structures and transmit them to API consumers without applying authorization-aware projection. Sensitive fields that should be restricted to privileged contexts are included in standard responses.

Attack Vector

Exploitation requires network access to the Concert Software API surface. An attacker issues crafted requests to vulnerable endpoints and parses the responses for sensitive fields. No credentials, tokens, or user interaction are required. The vulnerability manifests purely through response inspection. See the IBM Support Page for vendor-confirmed technical context.

Detection Methods for CVE-2024-49827

Indicators of Compromise

Unexpected outbound API responses from Concert endpoints containing fields not normally returned to the requesting role.
Repeated unauthenticated requests to Concert API paths from external or unusual source IP addresses.
Web server access logs showing enumeration patterns against Concert REST endpoints.

Detection Strategies

Inspect HTTP response bodies from Concert services for sensitive field names that should not appear in unauthenticated responses.
Compare API response schemas across version 1.0.0 through 1.1.0 against the patched baseline provided by IBM.
Correlate Concert request volumes with user authentication events to identify anonymous scraping behavior.

Monitoring Recommendations

Enable verbose access logging on the Concert application tier and forward logs to a centralized analytics platform.
Alert on bursts of GET requests to Concert API endpoints from a single source over short time windows.
Track changes in response payload sizes that may indicate enumeration of exposed records.

How to Mitigate CVE-2024-49827

Immediate Actions Required

Identify all IBM Concert Software deployments at versions 1.0.0 through 1.1.0 and inventory their network exposure.
Apply the fix referenced in the IBM security bulletin as soon as operational change windows permit.
Restrict network access to Concert APIs to authenticated internal consumers using firewall or reverse-proxy controls.

Patch Information

IBM has published remediation guidance on the IBM Support Page. Administrators should review the bulletin and upgrade to the fixed release identified by IBM for Concert Software. No public proof-of-concept exploit is currently available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Workarounds

Place Concert behind an authenticating reverse proxy that strips sensitive response fields until the patch is applied.
Limit Concert API exposure to trusted management networks using network segmentation and access control lists.
Apply Web Application Firewall response-inspection rules that redact known sensitive field patterns in transit.

bash

# Example: restrict Concert API exposure with iptables until patched
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP