CVE-2020-14864: Oracle BI Information Disclosure Flaw

CVE-2020-14864 Overview

CVE-2020-14864 is a Path Traversal (Local File Inclusion) vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Fusion Middleware, specifically affecting the Installation component. This vulnerability allows unauthenticated attackers with network access via HTTP to compromise Oracle Business Intelligence Enterprise Edition instances, potentially resulting in unauthorized access to critical data or complete access to all Oracle Business Intelligence Enterprise Edition accessible data.

The vulnerability is classified as easily exploitable due to its low attack complexity and the fact that no authentication or user interaction is required for successful exploitation. This makes it particularly dangerous in internet-facing deployments.

Critical Impact

This vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild. Unauthenticated attackers can leverage this path traversal flaw to access sensitive files and critical business intelligence data without any credentials.

Affected Products

• Oracle Business Intelligence Enterprise Edition 5.5.0.0.0
• Oracle Business Intelligence Enterprise Edition 12.2.1.3.0
• Oracle Business Intelligence Enterprise Edition 12.2.1.4.0

Discovery Timeline

• October 21, 2020 - CVE-2020-14864 published to NVD
• October 27, 2025 - Last updated in NVD database

Technical Details for CVE-2020-14864

Vulnerability Analysis

This vulnerability resides in the Installation component of Oracle Business Intelligence Enterprise Edition and manifests as a path traversal (directory traversal) weakness classified under CWE-22. The flaw enables attackers to manipulate file paths in HTTP requests to access files outside of the intended directory structure. Since no authentication is required, any attacker with network access to the vulnerable service can exploit this vulnerability.

The confidentiality impact is rated as high because successful exploitation grants access to critical data, including potentially sensitive business intelligence reports, configuration files, and other accessible data within the Oracle Business Intelligence environment. However, the vulnerability does not allow modification of data (no integrity impact) or cause service disruption (no availability impact).

Root Cause

The root cause is improper input validation in the Installation component's file handling mechanisms. The application fails to properly sanitize user-supplied input used in file path operations, allowing attackers to use path traversal sequences (such as ../) to escape the intended directory and access arbitrary files on the underlying system.

Attack Vector

The attack is executed remotely over HTTP without requiring any authentication credentials. An attacker sends specially crafted HTTP requests containing path traversal sequences to the vulnerable Oracle Business Intelligence Enterprise Edition installation. The server processes these requests without adequate validation, allowing the attacker to read files from arbitrary locations on the file system that are accessible to the web server process.

The vulnerability can be exploited to read sensitive configuration files, application data, and potentially system files depending on the server's file system permissions and the privileges of the web server process.

Detection Methods for CVE-2020-14864

Indicators of Compromise

• HTTP requests to Oracle Business Intelligence endpoints containing path traversal sequences such as ../, ..%2F, or URL-encoded variants
• Unusual file access patterns in web server logs targeting system configuration files or sensitive directories
• Access attempts to files outside the web application root directory through the Oracle BI web interface
• Log entries showing requests with double-encoded or nested traversal sequences attempting to bypass security filters

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block path traversal patterns in HTTP requests targeting Oracle Business Intelligence endpoints
• Monitor HTTP access logs for suspicious patterns including multiple ../ sequences, encoded traversal attempts, and requests for system files
• Implement file integrity monitoring on sensitive configuration and data files that could be targeted through this vulnerability
• Configure intrusion detection systems (IDS) with signatures for known Oracle BI LFI exploitation patterns

Monitoring Recommendations

• Enable detailed HTTP request logging for all Oracle Business Intelligence Enterprise Edition installations
• Set up alerts for repeated failed file access attempts or access to unusual file paths through web interfaces
• Monitor for exploitation attempts using threat intelligence feeds that include CVE-2020-14864 indicators
• Review web server error logs for path-related errors that may indicate exploitation attempts

How to Mitigate CVE-2020-14864

Immediate Actions Required

• Apply the Oracle Critical Patch Update (CPU) from October 2020 immediately to all affected Oracle Business Intelligence Enterprise Edition installations
• Restrict network access to Oracle Business Intelligence installations to only authorized users and networks using firewall rules
• Implement a web application firewall with rules to block path traversal attempts until patching is complete
• Review access logs for signs of prior exploitation and investigate any suspicious activity

Patch Information

Oracle has addressed this vulnerability in the October 2020 Critical Patch Update. Administrators should apply the security patches available through the Oracle Security Alert CPU October 2020. Given that this vulnerability is actively exploited in the wild and listed in CISA's Known Exploited Vulnerabilities catalog, patching should be treated as a high priority.

Workarounds

• Deploy a reverse proxy or web application firewall in front of Oracle Business Intelligence to filter malicious path traversal requests
• Implement strict network segmentation to limit access to the Oracle BI server from untrusted networks
• If possible, restrict HTTP access to the Installation component to only trusted administrative IP addresses
• Monitor and alert on any access attempts to sensitive file paths through the web interface until patching can be completed

# Example WAF rule configuration to block path traversal attempts
# ModSecurity rule example for Apache/Nginx
SecRule REQUEST_URI "@contains ../" \
    "id:100001,phase:1,deny,status:403,log,msg:'Path Traversal Attempt Blocked - CVE-2020-14864'"

# Network-level restriction example using iptables
# Restrict access to Oracle BI ports from trusted networks only
iptables -A INPUT -p tcp --dport 9502 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 9502 -j DROP