CVE-2021-41714 : Exploit Details and Defense Strategies

In Tipask < 3.5.9, path parameters entered by the user are not validated when downloading attachments, allowing a registered user to download arbitrary files on the Tipask server, leading to information leakage.

Understanding CVE-2021-41714

In Tipask < 3.5.9, a vulnerability exists that permits unauthorized downloading of files, posing a high severity risk to confidentiality.

What is CVE-2021-41714?

The vulnerability in Tipask < 3.5.9 enables registered users to download any files on the server, potentially exposing sensitive data like .env, /etc/passwd, or laravel.log.

The Impact of CVE-2021-41714

CVSS Base Score: 7.7 (High Severity)
Attack Complexity: Low
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: None
Privileges Required: Low
Scope: Changed

Technical Details of CVE-2021-41714

A closer look at the technical aspects and implications of this CVE.

Vulnerability Description

The lack of input validation in Tipask < 3.5.9 allows users to download files without proper verification, leading to unauthorized access to sensitive information.

Affected Systems and Versions

Affected Versions: Tipask < 3.5.9

Exploitation Mechanism

The vulnerability is exploited through manipulating path parameters during attachment downloads, enabling users to access unauthorized files.

Mitigation and Prevention

Measures to address and prevent the exploitation of CVE-2021-41714.

Immediate Steps to Take

Update Tipask to version 3.5.9 or above to patch the vulnerability.
Restrict user permissions to minimize access to sensitive files.

Long-Term Security Practices

Implement secure coding practices to validate user input and prevent similar vulnerabilities.
Regular security assessments and code reviews to identify and address potential loopholes.

Patching and Updates

Regularly monitor for security advisories and apply software updates promptly to mitigate known vulnerabilities.