CVE-2021-42331 Explained : Impact and Mitigation
Learn about CVE-2021-42331 affecting ShinHer StudyOnline System with improper authorization, allowing remote attackers to edit tutorial schedules. Find mitigation steps here.
ShinHer Information Co., LTD.'s StudyOnline System is affected by an improper authorization vulnerability that allows remote attackers to access and edit other users' tutorial schedules through crafted URL parameters.
Understanding CVE-2021-42331
The vulnerability in ShinHer StudyOnline System poses a risk to the confidentiality and integrity of user data.
What is CVE-2021-42331?
The 'Study Edit' function in the StudyOnline System lacks proper permission controls, enabling unauthorized access and editing of tutorial schedules by malicious parties.
The Impact of CVE-2021-42331
The vulnerability has a CVSS base score of 5.4, with a medium severity rating. It can be exploited remotely without user interaction, affecting confidentiality and integrity but not availability.
Technical Details of CVE-2021-42331
The technical aspects of the CVE shed light on the specific characteristics of the vulnerability.
Vulnerability Description
The improper authorization vulnerability allows attackers to manipulate URL parameters to gain unauthorized access to and modify other users' tutorial schedules within the system.
Affected Systems and Versions
- Product: ShinHer StudyOnline System
- Vendor: ShinHer Information Co., LTD.
- Versions Affected: Up to and including 2021
Exploitation Mechanism
Attack Vector: Network Attack Complexity: Low Privileges Required: Low Integrity Impact: Low Confidentiality Impact: Low User Interaction: None Scope: Unchanged
Mitigation and Prevention
Effective strategies to address and prevent the exploitation of CVE-2021-42331.
Immediate Steps to Take
- Update ShinHer StudyOnline System to version v2021.08.20.01 to patch the vulnerability.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing.
- Implement strict access controls and user permissions.
- Train users on safe web practices to mitigate social engineering attacks.
Patching and Updates
Regularly monitor for security updates and apply patches promptly to secure the system.