CVE-2021-35035 : What You Need to Know
Understand the impact and mitigation strategies for CVE-2021-35035, a cleartext storage vulnerability in Zyxel NBG6604 firmware allowing remote attackers to access critical data.
A cleartext storage of sensitive information vulnerability in Zyxel NBG6604 series firmware has been identified. This CVE allows a remote attacker to access sensitive data from the configuration file.
Understanding CVE-2021-35035
This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-35035.
What is CVE-2021-35035?
The CVE-2021-35035 vulnerability pertains to cleartext storage of sensitive information in Zyxel NBG6604 firmware, enabling authenticated attackers to extract critical data.
The Impact of CVE-2021-35035
With a CVSS base score of 4.9 (medium severity), this vulnerability can lead to unauthorized access to confidential information stored within the configuration file.
Technical Details of CVE-2021-35035
Let's dive deeper into the specifics of the vulnerability.
Vulnerability Description
The flaw involves the improper storage of sensitive data in cleartext format within the firmware, facilitating data extraction by remote attackers.
Affected Systems and Versions
Zyxel NBG6604 firmware version 1.00(ABIR.8)C0 is confirmed to be impacted by this vulnerability.
Exploitation Mechanism
Remote, authenticated attackers can exploit this vulnerability to retrieve sensitive information from the configuration file.
Mitigation and Prevention
Explore the measures to address and prevent CVE-2021-35035.
Immediate Steps to Take
- Update the Zyxel NBG6604 firmware to a secure version that addresses the cleartext storage vulnerability.
- Implement firewall rules to restrict unauthorized access to sensitive configuration files.
Long-Term Security Practices
- Regularly monitor security advisories from Zyxel for any new updates or patches related to vulnerabilities.
- Follow secure coding practices to prevent similar information disclosure risks in the future.
Patching and Updates
Ensure timely application of security patches released by Zyxel to fix vulnerabilities and enhance the overall security posture of the NBG6604 series firmware.