CVE-2020-7667 : Vulnerability Insights and Analysis

In package github.com/sassoftware/go-rpmutils/cpio before version 0.1.0, the CPIO extraction functionality doesn't sanitize the paths of the archived files for leading and non-leading ".." which leads in file extraction outside of the current directory. This vulnerability allows for Arbitrary File Write via Archive Extraction (Zip Slip).

Understanding CVE-2020-7667

This CVE involves a security issue in the CPIO extraction functionality of the specified package, potentially leading to unauthorized file extraction.

What is CVE-2020-7667?

CVE-2020-7667 is a vulnerability in the package github.com/sassoftware/go-rpmutils/cpio before version 0.1.0, allowing for arbitrary file write through archive extraction.

The Impact of CVE-2020-7667

The impact of this vulnerability is rated as HIGH severity with a CVSS base score of 7.5. It can lead to unauthorized file writes due to improper path sanitization during archive extraction.

Technical Details of CVE-2020-7667

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from the lack of path sanitization in the CPIO extraction functionality, enabling malicious actors to write files outside the intended directory.

Affected Systems and Versions

Affected Product: github.com/sassoftware/go-rpmutils/cpio
Vulnerable Version: < 0.1.0

Exploitation Mechanism

The exploitation involves manipulating the paths of archived files to include leading and non-leading ".." characters, allowing for file extraction beyond the intended directory.

Mitigation and Prevention

To address CVE-2020-7667, follow these mitigation strategies:

Immediate Steps to Take

Update the package to version 0.1.0 or newer to mitigate the vulnerability.
Monitor for any unauthorized file writes or suspicious activities.

Long-Term Security Practices

Implement input validation to ensure proper file path handling.
Regularly review and update security practices to prevent similar vulnerabilities.

Patching and Updates

Apply patches provided by the package maintainers promptly to address security issues and prevent exploitation.