CVE-2021-42839 : Exploit Details and Defense Strategies
Learn about CVE-2021-42839 affecting Grand Vice info Co. webopac7. Discover the impact, affected systems, and mitigation steps for this arbitrary file upload vulnerability.
Grand Vice info Co. webopac7 file upload function fails to filter special characters, allowing remote attackers to execute arbitrary code.
Understanding CVE-2021-42839
What is CVE-2021-42839?
The vulnerability in Grand Vice info Co. webopac7 enables attackers to upload malicious scripts and gain system control.
The Impact of CVE-2021-42839
The vulnerability has a CVSS base score of 8.8 (High) with high impacts on confidentiality, integrity, and availability.
Technical Details of CVE-2021-42839
Vulnerability Description
Failure to filter special characters in file uploads allows remote attackers to execute arbitrary code.
Affected Systems and Versions
- Product: webopac7
- Vendor: Grand Vice info Co.
- Versions Affected: 7.1.20160701, 1.8.20160701
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Privileges Required: Low
- User Interaction: None
Mitigation and Prevention
Immediate Steps to Take
- Contact tech support from Grand Vice info Co. for guidance.
Long-Term Security Practices
- Implement input validation mechanisms to filter special characters in file uploads.
- Regularly monitor and update security patches for the affected system.