CVE-2024-1147: OpenText PVCS Auth Bypass Vulnerability

CVE-2024-1147 Overview

A critical authentication bypass vulnerability has been identified in OpenText PVCS Version Manager. This weakness in access control mechanisms allows unauthenticated attackers to potentially bypass authentication and download files from the affected system. PVCS Version Manager is a widely-used software configuration management tool, making this vulnerability particularly concerning for organizations relying on it for source code and version control.

Critical Impact

Unauthenticated remote attackers can bypass authentication mechanisms to access and download files, potentially exposing sensitive source code, configuration data, and other critical assets stored within the version management system.

Affected Products

• OpenText PVCS Version Manager (specific versions not disclosed in advisory)

Discovery Timeline

• 2024-03-21 - CVE CVE-2024-1147 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-1147

Vulnerability Analysis

This vulnerability is classified under CWE-287 (Improper Authentication), indicating a fundamental flaw in how the application verifies user identity. The weakness allows attackers to circumvent the authentication process entirely, granting unauthorized access to protected resources without providing valid credentials.

The attack can be executed remotely over the network without requiring any prior authentication or user interaction, significantly increasing the risk profile. Successful exploitation could result in unauthorized access to version-controlled files, potentially including proprietary source code, configuration files, and other sensitive intellectual property managed by PVCS Version Manager.

Root Cause

The vulnerability stems from weak access control implementation within OpenText PVCS Version Manager. The authentication mechanism fails to properly validate user requests before granting access to protected resources, allowing attackers to craft requests that bypass the intended security controls. This improper authentication implementation enables direct access to file download functionality without proper credential verification.

Attack Vector

The attack vector is network-based, requiring no privileges or user interaction. An attacker can exploit this vulnerability by sending specially crafted requests to the PVCS Version Manager server. The weak access control fails to properly enforce authentication requirements, allowing the attacker to access the file download functionality directly.

The exploitation flow involves:

1. Identifying a vulnerable PVCS Version Manager instance accessible over the network
2. Crafting HTTP requests that bypass the authentication layer
3. Accessing protected file download endpoints without valid credentials
4. Extracting sensitive files from the version control repository

For detailed technical information about this vulnerability, refer to the Micro Focus Knowledge Article.

Detection Methods for CVE-2024-1147

Indicators of Compromise

• Unexpected file access or download requests to PVCS Version Manager without corresponding authentication logs
• Anomalous network traffic patterns to the PVCS Version Manager server from unknown or suspicious IP addresses
• Access log entries showing file downloads without valid session tokens or authentication headers
• Unusual spikes in data egress from systems hosting PVCS Version Manager

Detection Strategies

• Monitor PVCS Version Manager access logs for requests that bypass normal authentication workflows
• Implement network intrusion detection rules to identify suspicious access patterns targeting PVCS endpoints
• Deploy web application firewalls (WAF) to detect and block authentication bypass attempts
• Enable detailed logging on the PVCS Version Manager server to capture all access attempts

Monitoring Recommendations

• Configure SIEM alerts for failed or anomalous authentication attempts against PVCS Version Manager
• Implement file integrity monitoring on directories managed by PVCS to detect unauthorized access
• Monitor outbound data transfers from PVCS servers for potential data exfiltration
• Regularly review access logs for patterns consistent with authentication bypass exploitation

How to Mitigate CVE-2024-1147

Immediate Actions Required

• Review the official vendor advisory at the Micro Focus Knowledge Article for patching guidance
• Restrict network access to PVCS Version Manager to only authorized users and internal networks
• Implement additional authentication layers such as VPN or reverse proxy with authentication
• Conduct an audit of recent file access logs to identify potential unauthorized downloads

Patch Information

OpenText has addressed this vulnerability. Administrators should consult the Micro Focus Knowledge Article for the latest patch information and update instructions. Apply the vendor-provided security update as soon as possible to remediate this critical authentication bypass vulnerability.

Workarounds

• Place PVCS Version Manager behind a VPN or authenticated reverse proxy to add an additional authentication layer
• Configure firewall rules to restrict access to PVCS Version Manager from trusted IP addresses only
• Disable or restrict access to file download functionality until patches can be applied
• Implement network segmentation to isolate PVCS Version Manager from untrusted network segments

# Example: Restrict network access using iptables (Linux)
# Allow access only from trusted subnet
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP