CVE-2017-16123: Directory Traversal in welcomyzt
Summary
CVE-2017-16123: Directory Traversal in welcomyzt. Affects welcomyzt versions >= 0.0.0. No fix is published. How to fix ↓
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Background
welcomyzt is a simple file server that allows users to serve files over HTTP. It is commonly used for local development purposes. However, it is vulnerable to a directory traversal issue, which can be exploited by an attacker to gain unauthorized access to the filesystem. This vulnerability occurs when the server fails to properly sanitize user input, allowing the attacker to navigate to directories outside of the intended scope by including "../" in the URL.
Vulnerability Detail
The directory traversal vulnerability in welcomyzt enables an attacker to bypass the file server's intended restrictions and access files outside of the designated directory. By including "../" in the URL, the attacker can traverse the directory structure and read sensitive files, such as the "/etc/passwd" file. This can lead to unauthorized disclosure of sensitive information and potentially enable further attacks on the system. The vulnerability has a high severity rating (CVSS score not provided) and is classified under CWE-22 (Path Traversal).
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, it is recommended to implement proper input validation and sanitization on the server-side to prevent directory traversal attacks. This can be achieved by validating user input and ensuring that requested files are within the intended directory scope. Additionally, access controls and permissions should be properly configured to restrict access to sensitive files and directories.
Conclusion
The directory traversal vulnerability in welcomyzt poses a significant risk to the security of the system. It allows an attacker to access sensitive files and potentially perform further malicious actions. To mitigate this risk, it is crucial to follow the recommended steps, such as using welcomyzt only for local development and implementing proper input validation and access controls. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
welcomyzt is a simple file server used for serving files over HTTP. It is commonly used for local development purposes.
A directory traversal vulnerability allows an attacker to access files outside of the intended directory by manipulating input that specifies the file path. In the case of welcomyzt, an attacker can use "../" in the URL to navigate to directories outside of the designated scope.
By exploiting this vulnerability, an attacker can read sensitive files on the server, such as the "/etc/passwd" file. This can lead to unauthorized disclosure of sensitive information and potentially enable further attacks on the system.
No, there is no patch available for this vulnerability. It is recommended to use welcomyzt only for local development purposes or switch to a different package for production environments.
To mitigate the risk of this vulnerability, it is recommended to implement proper input validation and sanitization on the server-side. Additionally, access controls and permissions should be properly configured to restrict access to sensitive files and directories.
