CVE-2025-36157: IBM Jazz Foundation Auth Bypass Flaw

CVE-2025-36157 Overview

IBM Jazz Foundation versions 7.0.2 through 7.0.2 iFix035, 7.0.3 through 7.0.3 iFix018, and 7.1.0 through 7.1.0 iFix004 contain an authorization bypass vulnerability that could allow an unauthenticated remote attacker to update server property files. This critical security flaw enables attackers to modify configuration files without proper authorization, potentially leading to unauthorized actions on the affected system.

Critical Impact

Unauthenticated remote attackers can modify server property files to perform unauthorized actions, potentially compromising system integrity and availability.

Affected Products

• IBM Jazz Foundation 7.0.2 through 7.0.2 iFix035
• IBM Jazz Foundation 7.0.3 through 7.0.3 iFix018
• IBM Jazz Foundation 7.1.0 through 7.1.0 iFix004

Discovery Timeline

• August 24, 2025 - CVE-2025-36157 published to NVD
• December 18, 2025 - Last updated in NVD database

Technical Details for CVE-2025-36157

Vulnerability Analysis

This vulnerability is classified under CWE-863 (Incorrect Authorization), indicating that the affected IBM Jazz Foundation versions fail to properly validate user permissions before allowing modifications to server property files. The flaw allows unauthenticated attackers accessing the system via network to bypass authorization controls and directly manipulate configuration files that should require administrative privileges.

The vulnerability is particularly severe because it requires no authentication and can be exploited remotely over the network with low attack complexity. While the vulnerability does not directly expose confidential data, it enables attackers to achieve high impact on both integrity and availability of the affected systems by modifying critical server configurations.

Root Cause

The root cause stems from improper authorization checks in the IBM Jazz Foundation's file handling mechanisms. The application fails to verify that a user has the appropriate permissions before processing requests to update server property files. This broken access control allows unauthenticated users to perform actions that should be restricted to authorized administrators only.

Attack Vector

The attack can be executed remotely over the network without requiring any prior authentication or user interaction. An attacker can send specially crafted requests to the vulnerable Jazz Foundation server to modify property files. The network-based attack vector combined with the lack of authentication requirements makes this vulnerability highly exploitable in environments where Jazz Foundation servers are accessible from untrusted networks.

The exploitation process involves identifying vulnerable Jazz Foundation instances and then sending malicious requests that target the property file update functionality. Since no authentication is required, attackers can directly interact with the vulnerable endpoint to manipulate server configurations, potentially enabling further malicious actions such as service disruption or establishing persistence.

Detection Methods for CVE-2025-36157

Indicators of Compromise

• Unexpected modifications to server property files in the Jazz Foundation installation directory
• Unusual HTTP requests targeting configuration or administrative endpoints from unauthenticated sources
• Property file changes that do not correlate with authorized administrator activity or change management records

Detection Strategies

• Monitor file integrity for Jazz Foundation property files and configuration directories using file integrity monitoring (FIM) tools
• Analyze web application logs for suspicious requests to administrative endpoints from unauthenticated sessions
• Deploy network intrusion detection signatures to identify exploitation attempts targeting Jazz Foundation servers

Monitoring Recommendations

• Implement centralized logging for all Jazz Foundation server access and configuration changes
• Configure alerts for any property file modifications occurring outside scheduled maintenance windows
• Review access logs regularly for patterns indicating reconnaissance or exploitation attempts against Jazz Foundation instances

How to Mitigate CVE-2025-36157

Immediate Actions Required

• Apply the latest IBM security patches immediately by upgrading to IBM Jazz Foundation 7.0.2 iFix036 or later, 7.0.3 iFix019 or later, or 7.1.0 iFix005 or later
• Restrict network access to Jazz Foundation servers using firewall rules to limit exposure to trusted networks only
• Review and audit current server property file configurations for any unauthorized modifications

Patch Information

IBM has released security patches addressing this vulnerability. Organizations running affected versions should consult the IBM Security Advisory for detailed patching instructions and download the appropriate interim fix for their deployed version. The patch addresses the authorization bypass by implementing proper authentication and authorization checks before allowing property file modifications.

Workarounds

• Implement network segmentation to isolate Jazz Foundation servers from untrusted network segments
• Deploy a web application firewall (WAF) to filter malicious requests targeting administrative endpoints
• Enable enhanced logging and monitoring while awaiting patch deployment to detect any exploitation attempts

# Example: Restrict access to Jazz Foundation using iptables
# Allow access only from trusted management subnet
iptables -A INPUT -p tcp --dport 9443 -s 10.0.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 9443 -j DROP