CVE-2020-7668 : Security Advisory and Response

A vulnerability in the package github.com/unknwon/cae/tz could allow an attacker to manipulate files system-wide through zip archives.

Understanding CVE-2020-7668

This CVE involves a security issue in the ExtractTo function of the github.com/unknwon/cae/tz package.

What is CVE-2020-7668?

The vulnerability in all versions of the package allows attackers to add or replace files system-wide by exploiting insecure file path handling in zip archives.

The Impact of CVE-2020-7668

The vulnerability has a high severity rating with a CVSS base score of 7.5. It can lead to arbitrary file manipulation and compromise system integrity.

Technical Details of CVE-2020-7668

The technical aspects of the vulnerability provide insight into its nature and potential risks.

Vulnerability Description

The ExtractTo function in github.com/unknwon/cae/tz does not securely escape file paths in zip archives containing "..", enabling attackers to modify files across the system.

Affected Systems and Versions

Package: github.com/unknwon/cae/tz
Versions: All versions with an unspecified version number

Exploitation Mechanism

The vulnerability can be exploited by crafting malicious zip archives with specially crafted file paths to perform arbitrary file write operations.

Mitigation and Prevention

Protecting systems from CVE-2020-7668 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the affected package to a secure version if available.
Implement input validation to prevent malicious file paths.
Monitor and restrict file system access.

Long-Term Security Practices

Regularly audit and review code for insecure file handling practices.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security updates for the github.com/unknwon/cae/tz package.