CVE-2025-36160: IBM Concert Information Disclosure Flaw

CVE-2025-36160 Overview

CVE-2025-36160 affects IBM Concert versions 1.0.0 through 2.0.0. The application discloses sensitive server information through HTTP response headers. Attackers can use this exposed data to fingerprint the environment and plan follow-on attacks against the system.

The flaw is categorized under [CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere]. It is remotely exploitable over the network without authentication or user interaction. IBM has issued a security advisory and patch through its support portal.

Critical Impact

Unauthenticated remote attackers can obtain sensitive server details from HTTP response headers, providing reconnaissance data that aids in targeted exploitation of IBM Concert deployments.

Affected Products

• IBM Concert 1.0.0
• IBM Concert versions between 1.0.0 and 2.0.0
• IBM Concert 2.0.0

Discovery Timeline

• 2025-11-20 - CVE-2025-36160 published to NVD
• 2025-11-21 - Last updated in NVD database

Technical Details for CVE-2025-36160

Vulnerability Analysis

IBM Concert is a governance platform that consolidates application, security, and operational data across enterprise environments. The vulnerability resides in how the platform constructs HTTP responses. Server-side metadata is included in response headers returned to any HTTP client.

This information exposure provides attackers with details such as software versions, framework identifiers, or backend technology fingerprints. Reconnaissance of this type accelerates the selection of relevant exploits and reduces the noise an attacker generates while probing the target.

The issue is confidentiality-only. It does not directly modify data or affect availability, but it materially lowers the effort required to chain subsequent attacks against the same host.

Root Cause

The root cause is improper suppression of server and framework headers in HTTP responses, consistent with [CWE-497]. The application or its underlying web stack returns headers that reveal internal implementation details rather than stripping or normalizing them before transmission.

Attack Vector

An unauthenticated remote attacker issues standard HTTP requests against an exposed IBM Concert endpoint. The server responds with headers containing sensitive system information. The attacker parses those headers to enumerate version data and platform components, then uses the results to scope further exploitation. No privileges, user interaction, or special preconditions are required.

The vulnerability is described in prose only because IBM has not published exploitation details and no public proof-of-concept exists. Refer to the IBM Support Page for vendor-supplied technical context.

Detection Methods for CVE-2025-36160

Indicators of Compromise

• Repeated unauthenticated HTTP HEAD or GET requests against IBM Concert endpoints from a single source, often targeting root paths or error-generating URLs.
• Outbound HTTP responses from Concert hosts containing verbose Server, X-Powered-By, or framework-specific headers.
• Reconnaissance traffic patterns originating from scanning tools such as nmap, nikto, or whatweb directed at Concert URLs.

Detection Strategies

• Inspect HTTP responses from IBM Concert hosts for headers disclosing server, framework, or version information and alert when present.
• Correlate web access logs with downstream exploitation attempts targeting the same source IP within a short time window.
• Deploy web application firewall (WAF) rules to flag external requests that elicit responses containing sensitive headers.

Monitoring Recommendations

• Forward IBM Concert reverse proxy and application logs into a centralized SIEM for header-content analysis and baseline comparison.
• Monitor for anomalous spikes in HTTP request volume against Concert management interfaces from untrusted networks.
• Track patch status of all Concert instances and alert when versions in the 1.0.0–2.0.0 range remain unpatched.

How to Mitigate CVE-2025-36160

Immediate Actions Required

• Apply the fix referenced in the IBM Concert security bulletin to all instances running versions 1.0.0 through 2.0.0.
• Restrict network exposure of IBM Concert management interfaces to trusted administrative networks only.
• Audit existing HTTP responses from Concert services to confirm that sensitive headers are no longer returned after patching.

Patch Information

IBM has published a security advisory and remediation guidance for CVE-2025-36160 on its support portal. Administrators should consult the IBM Support Page for the specific fix pack or upgrade path applicable to their deployment of IBM Concert.

Workarounds

• Place IBM Concert behind a reverse proxy configured to strip or rewrite Server, X-Powered-By, and similar headers before responses leave the trust boundary.
• Apply network access controls so that only authorized administrators and integrated services can reach Concert HTTP endpoints.
• Disable verbose error pages and debug responses that may compound information disclosure during failure conditions.

# Example nginx configuration to suppress sensitive response headers
server {
    listen 443 ssl;
    server_name concert.example.com;

    server_tokens off;
    more_clear_headers 'Server' 'X-Powered-By' 'X-AspNet-Version';

    location / {
        proxy_pass https://ibm-concert-backend;
        proxy_hide_header X-Powered-By;
        proxy_hide_header Server;
    }
}