CVE-2020-7653 : Security Advisory and Response

Snyk-broker versions before 4.80.0 are susceptible to Arbitrary File Read, enabling unauthorized users to access files by creating symlinks.

Understanding CVE-2020-7653

This CVE identifies a security vulnerability in snyk-broker versions pre-4.80.0 that allows for Arbitrary File Read.

What is CVE-2020-7653?

CVE-2020-7653 pertains to a flaw in snyk-broker versions before 4.80.0, enabling unauthorized file access through symlink creation.

The Impact of CVE-2020-7653

The vulnerability permits unauthorized users within Snyk's internal network to read arbitrary files by manipulating symlinks.

Technical Details of CVE-2020-7653

Snyk-broker's security issue is detailed below.

Vulnerability Description

The flaw in snyk-broker versions prior to 4.80.0 allows unauthorized users to read arbitrary files by linking to whitelisted paths.

Affected Systems and Versions

Product: snyk-broker
Vendor: Not applicable
Vulnerable Versions: All versions before 4.80.0

Exploitation Mechanism

Unauthorized users exploit this vulnerability by creating symlinks to match specific whitelisted paths, granting access to arbitrary files.

Mitigation and Prevention

Protect your systems from CVE-2020-7653 with the following measures.

Immediate Steps to Take

Upgrade snyk-broker to version 4.80.0 or newer to mitigate the Arbitrary File Read vulnerability.
Monitor and restrict symlink creation permissions to prevent unauthorized file access.

Long-Term Security Practices

Regularly review and update access controls to limit file exposure.
Conduct security audits to identify and address potential symlink vulnerabilities.

Patching and Updates

Stay informed about security patches and updates for snyk-broker to address known vulnerabilities promptly.