CVE-2024-53961: Adobe ColdFusion Path Traversal Flaw

CVE-2024-53961 Overview

CVE-2024-53961 is a Path Traversal vulnerability affecting Adobe ColdFusion versions 2023.11, 2021.17 and earlier. This vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and allows attackers to read arbitrary files from the system by manipulating file path inputs to escape restricted directories. An attacker could exploit this vulnerability to access files or directories outside of the application's intended boundaries, potentially leading to the disclosure of sensitive information or manipulation of system data.

Critical Impact

Successful exploitation enables unauthorized access to sensitive files on vulnerable ColdFusion servers when the admin panel is exposed to the internet, potentially compromising configuration files, credentials, and other confidential data.

Affected Products

• Adobe ColdFusion 2023 (Update 11 and earlier)
• Adobe ColdFusion 2021 (Update 17 and earlier)
• All intermediate updates for both ColdFusion 2021 and 2023 product lines

Discovery Timeline

• December 23, 2024 - CVE-2024-53961 published to NVD
• April 16, 2025 - Last updated in NVD database

Technical Details for CVE-2024-53961

Vulnerability Analysis

This Path Traversal vulnerability stems from improper input validation in Adobe ColdFusion's file handling mechanisms. The application fails to adequately sanitize user-supplied input containing path traversal sequences such as ../ before using them to access files on the system. When the ColdFusion admin panel is exposed to the internet, attackers can leverage specially crafted requests to navigate outside of intended directory boundaries and read arbitrary files from the underlying file system.

The vulnerability requires network access and specifically targets ColdFusion installations where the administrative interface is publicly accessible. Successful exploitation could allow attackers to read sensitive configuration files, database credentials, application source code, and other confidential data stored on the server.

Root Cause

The root cause of CVE-2024-53961 is inadequate input validation and sanitization of file path parameters. The ColdFusion application does not properly restrict pathname inputs to the intended restricted directory structure, allowing malicious actors to inject directory traversal sequences that escape the application's sandbox. This represents a classic path traversal flaw where the application trusts user input for file system operations without sufficient validation.

Attack Vector

Exploitation requires network access to a vulnerable ColdFusion server with the admin panel exposed to the internet. An attacker would craft HTTP requests containing directory traversal sequences (e.g., ../../../etc/passwd or ..\..\..\windows\system32\config\sam) targeting vulnerable endpoints. These malicious path inputs bypass directory restrictions and enable reading of sensitive files anywhere on the file system accessible to the ColdFusion process.

The attack complexity is considered higher due to the prerequisite that the admin panel must be internet-facing, which reduces the overall attack surface compared to vulnerabilities exploitable through standard application endpoints.

Detection Methods for CVE-2024-53961

Indicators of Compromise

• HTTP requests to ColdFusion admin endpoints containing path traversal sequences such as ../, ..%2f, ..%5c, or URL-encoded variants
• Unusual file access patterns in ColdFusion logs indicating attempts to read files outside normal application directories
• Web server access logs showing requests with encoded directory traversal characters targeting /CFIDE/administrator/ or similar admin paths
• Unexpected reads of sensitive system files such as /etc/passwd, /etc/shadow, or Windows SAM database files

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block path traversal patterns in request URLs and parameters
• Monitor ColdFusion server logs for anomalous file access attempts targeting system directories
• Implement network intrusion detection rules to identify traversal sequences in HTTP traffic destined for ColdFusion servers
• Regularly audit ColdFusion admin panel access logs for unauthorized access attempts from external IP addresses

Monitoring Recommendations

• Enable verbose logging on ColdFusion servers to capture detailed request information including full URL paths
• Configure SIEM alerts for path traversal pattern detection targeting ColdFusion application endpoints
• Monitor for unusual outbound data transfers that may indicate successful data exfiltration following exploitation
• Implement file integrity monitoring on sensitive system files to detect unauthorized access

How to Mitigate CVE-2024-53961

Immediate Actions Required

• Apply the latest Adobe ColdFusion security updates as documented in APSB24-107
• Restrict admin panel access to internal networks only; do not expose ColdFusion admin interfaces to the internet
• Implement network segmentation to isolate ColdFusion servers from direct internet access
• Review ColdFusion server configurations to ensure principle of least privilege for file system access

Patch Information

Adobe has released security updates to address this vulnerability. Organizations running affected versions should upgrade to the latest patched versions:

• ColdFusion 2023: Update to version newer than Update 11
• ColdFusion 2021: Update to version newer than Update 17

Detailed patch information and download links are available in the Adobe ColdFusion Security Advisory APSB24-107.

Workarounds

• If immediate patching is not possible, restrict access to the ColdFusion admin panel by IP address using firewall rules or web server configuration
• Implement a reverse proxy with strict URL filtering to block requests containing path traversal sequences
• Disable or remove unnecessary ColdFusion admin endpoints until patches can be applied
• Consider placing vulnerable ColdFusion servers behind a VPN to prevent direct internet exposure

# Example: Restrict ColdFusion admin access via Apache configuration
<Directory "/opt/coldfusion/cfusion/wwwroot/CFIDE/administrator">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Directory>