CVE-2020-12265 : What You Need to Know

The decompress package before 4.2.1 for Node.js is vulnerable to Arbitrary File Write via ../ in an archive member, when a symlink is used, because of Directory Traversal.

Understanding CVE-2020-12265

This CVE involves a vulnerability in the decompress package for Node.js that allows for Arbitrary File Write through Directory Traversal.

What is CVE-2020-12265?

The vulnerability in the decompress package allows an attacker to write arbitrary files by exploiting directory traversal when a symlink is utilized.

The Impact of CVE-2020-12265

This vulnerability can be exploited by malicious actors to write files outside the intended directory structure, potentially leading to unauthorized access or manipulation of sensitive data.

Technical Details of CVE-2020-12265

The technical aspects of the CVE include:

Vulnerability Description

The vulnerability allows for Arbitrary File Write via directory traversal when a symlink is employed in the decompress package for Node.js.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability is exploited by utilizing directory traversal techniques in conjunction with a symlink to write files outside the intended directory structure.

Mitigation and Prevention

To address CVE-2020-12265, consider the following steps:

Immediate Steps to Take

Update the decompress package to version 4.2.1 or later to mitigate the vulnerability.
Avoid using symlinks in scenarios where untrusted input is involved.

Long-Term Security Practices

Regularly monitor and update dependencies to ensure known vulnerabilities are patched promptly.
Implement input validation mechanisms to prevent directory traversal attacks.

Patching and Updates

Apply patches and updates provided by the decompress package maintainers to address the vulnerability effectively.