CVE-2025-36253: IBM Concert Weak Cryptography Vulnerability

CVE-2025-36253 Overview

IBM Concert versions 1.0.0 through 2.1.0 contain a cryptographic vulnerability that uses weaker than expected cryptographic algorithms. This weakness could allow an attacker to decrypt highly sensitive information transmitted or stored by the application.

Critical Impact
Attackers exploiting this vulnerability could decrypt sensitive information, potentially exposing confidential data, credentials, or other protected content within IBM Concert deployments.

Affected Products

IBM Concert 1.0.0
IBM Concert 1.x through 2.0.x
IBM Concert 2.1.0

Discovery Timeline

2026-02-02 - CVE CVE-2025-36253 published to NVD
2026-02-03 - Last updated in NVD database

Technical Details for CVE-2025-36253

Vulnerability Analysis

This vulnerability stems from the use of weak cryptographic algorithms within IBM Concert. The weakness is classified under CWE-759 (Use of a One-Way Hash without a Salt), indicating that the application implements cryptographic operations without proper security measures such as salting hash functions.

The vulnerability requires network access and involves high attack complexity, meaning exploitation requires specific conditions to be met. However, no privileges or user interaction are required to attempt exploitation. When successfully exploited, an attacker could achieve high impact on confidentiality, gaining access to decrypt sensitive information.

Root Cause

The root cause of this vulnerability is the implementation of weaker than expected cryptographic algorithms in IBM Concert. This includes the potential use of one-way hashes without proper salting mechanisms (CWE-759), which significantly reduces the computational effort required for attackers to perform cryptographic attacks such as rainbow table lookups or precomputation attacks.

Attack Vector

The attack vector is network-based, allowing remote attackers to potentially intercept and decrypt sensitive communications or stored data. The high attack complexity indicates that successful exploitation depends on specific conditions, such as:

Intercepting encrypted network traffic
Gaining access to stored encrypted data
Having sufficient computational resources to perform cryptanalysis

Due to the nature of weak cryptography vulnerabilities, attackers with access to encrypted data may be able to perform offline attacks to recover plaintext information without direct interaction with the target system.

Detection Methods for CVE-2025-36253

Indicators of Compromise

Unusual network traffic patterns suggesting data exfiltration or man-in-the-middle interception
Evidence of unauthorized access to encrypted data stores within IBM Concert
Anomalous authentication attempts or session activity following potential credential decryption

Detection Strategies

Monitor network traffic for signs of cryptographic downgrade attacks or interception attempts
Audit IBM Concert configurations for use of deprecated or weak cryptographic algorithms
Review application logs for unauthorized data access patterns
Implement TLS inspection to detect weak cipher suite negotiations

Monitoring Recommendations

Enable verbose logging for IBM Concert cryptographic operations where available
Monitor for failed authentication attempts that may indicate credential compromise from decryption
Implement network-level monitoring for suspicious traffic to and from IBM Concert instances
Regular security audits of cryptographic implementations and configurations

How to Mitigate CVE-2025-36253

Immediate Actions Required

Review the IBM Support Page for official guidance and patches
Inventory all IBM Concert deployments running versions 1.0.0 through 2.1.0
Prioritize patching systems that handle highly sensitive information
Consider implementing additional encryption layers while awaiting patches

Patch Information

IBM has released security guidance for this vulnerability. Administrators should consult the official IBM Support Page for detailed patch information, including available fixes and upgrade paths for affected versions of IBM Concert.

Workarounds

Implement additional transport layer security (TLS 1.3) for all IBM Concert communications
Restrict network access to IBM Concert instances to trusted networks and users
Enable additional application-level encryption for sensitive data until patches are applied
Monitor for unauthorized access attempts and implement network segmentation to limit exposure

bash

# Configuration example
# Verify IBM Concert version and plan upgrade path
# Check current version:
# Navigate to IBM Concert admin console and verify version information
# Consult IBM support page for recommended upgrade procedures:
# https://www.ibm.com/support/pages/node/7257565