Source: cve@mitre.org
InterVations NaviCOPA Web Server 3.0.1.2 and earlier allows remote attackers to obtain the source code for a web page via a trailing encoded space character in a URI, as demonstrated by /index.html%20 and /index.php%20 URIs.
NaviCOPA Web Server versions 3.0.1.2 and earlier are vulnerable to a critical information disclosure flaw. Attackers can remotely retrieve the source code of web pages by appending an encoded space character to the URL, potentially revealing sensitive information like credentials and application logic, leading to complete system compromise. This vulnerability poses a significant risk due to its ease of exploitation and potential for widespread impact.
Step 1: Target Identification: The attacker identifies a NaviCOPA Web Server instance running a vulnerable version (3.0.1.2 or earlier).
Step 2: Payload Construction: The attacker crafts a malicious URL by appending an encoded space character (%20) to the target web page's URI (e.g., /index.php%20).
Step 3: Request Submission: The attacker sends the crafted URL to the vulnerable web server.
Step 4: Server Processing: The web server receives the request and attempts to locate the requested resource (e.g., /index.php).
Step 5: Vulnerability Trigger: Due to the flawed URI parsing, the server fails to correctly handle the trailing encoded space.
Step 6: Source Code Disclosure: Instead of rendering the web page, the server returns the source code of the requested file (e.g., index.php) to the attacker.
The vulnerability stems from improper handling of URI parsing within the NaviCOPA web server. The server fails to correctly sanitize or reject the trailing encoded space character (%20) in the requested URL. When a request like /index.html%20 is received, the server likely attempts to locate the file /index.html and then, due to the flawed parsing, returns the source code of the file instead of rendering the webpage. This indicates a flaw in the server's logic for handling URI normalization or file path resolution, likely a missing check or incorrect implementation of string comparison or manipulation functions. The root cause is a logic error in how the web server processes and interprets the URL, specifically the trailing encoded space, bypassing the intended security checks.
While no specific APT groups are definitively linked to this specific CVE, the ease of exploitation makes it attractive to a wide range of attackers, including those seeking initial access. The information disclosure could be used in conjunction with other vulnerabilities. CISA KEV: Not listed.
Network Intrusion Detection Systems (NIDS) can be configured to detect requests containing trailing encoded spaces (e.g., %20) in URLs.
Web Application Firewalls (WAFs) can be configured to block requests containing trailing encoded spaces.
Review web server access logs for requests with suspicious URIs (e.g., /index.php%20, /index.html%20).
Monitor file access logs for unexpected access to sensitive files (e.g., configuration files, source code files).
Upgrade to a patched version of NaviCOPA Web Server (if available).
Implement a WAF to filter out requests containing trailing encoded spaces.
Review and harden web server configuration to prevent unauthorized access to sensitive files.
Implement input validation and sanitization to correctly handle and reject unexpected characters in URLs.
Regularly scan the web server for vulnerabilities using vulnerability scanners.