CVE-2021-42121 Explained : Impact and Mitigation
Learn about CVE-2021-42121, impacting TopEase <= 7.1.27. Understand the vulnerability, its impact, affected systems, mitigation steps, and necessary updates for protection.
Denial of Service via Invalid Date Format in TopEase
Understanding CVE-2021-42121
What is CVE-2021-42121?
Insufficient Input Validation in Web Applications operating on Business-DNA Solutions GmbH's TopEase® Platform Version <= 7.1.27 on an object's date attribute(s) allows an authenticated remote attacker with Object Modification privileges to insert an unexpected format into date fields, leading to breaking the object page that the date field is present.
The Impact of CVE-2021-42121
- CVSS Score: 4.3 (Medium)
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: Low
- Availability Impact: Low
Technical Details of CVE-2021-42121
Vulnerability Description
The vulnerability involves insufficient input validation in the date attribute(s) of the TopEase® Platform, enabling an attacker to disrupt object pages by inserting unexpected date formats.
Affected Systems and Versions
- Affected Product: TopEase
- Vendor: Business-DNA Solutions GmbH
- Affected Version: <= 7.1.27 (Custom Version)
Exploitation Mechanism
The attacker needs Object Modification privileges to exploit the vulnerability by injecting unexpected date formats.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade TopEase to a version beyond 7.1.27
- Implement strict input validation for date fields
- Monitor date field inputs for unexpected formats
Long-Term Security Practices
- Regular security training for developers on input validation
- Conduct security assessments and code reviews periodically
Patching and Updates
- Apply vendor-recommended patches promptly