CVE-2023-35137 : Vulnerability Insights and Analysis
Learn about CVE-2023-35137, an improper authentication vulnerability in Zyxel NAS326 and NAS542 firmware versions. Take immediate steps to secure affected systems and prevent unauthorized access.
This article provides an overview of CVE-2023-35137, an improper authentication vulnerability found in Zyxel NAS326 and NAS542 firmware versions V5.21(AAZF.14)C0 and V5.21(ABAG.11)C0 respectively.
Understanding CVE-2023-35137
CVE-2023-35137 is an improper authentication vulnerability discovered in Zyxel NAS326 and NAS542 firmware versions. This vulnerability could allow an unauthenticated attacker to obtain system information through a crafted URL.
What is CVE-2023-35137?
An improper authentication vulnerability in the authentication module of Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to obtain system information by sending a crafted URL to a vulnerable device.
The Impact of CVE-2023-35137
The impact of CVE-2023-35137 is rated as high severity, with a CVSS base score of 7.5. Attackers can exploit this vulnerability to access sensitive system information without proper authentication.
Technical Details of CVE-2023-35137
This section delves into the technical aspects of CVE-2023-35137, including the vulnerability description, affected systems, and exploitation mechanism.
Vulnerability Description
The vulnerability lies in the authentication module of Zyxel NAS326 and NAS542 firmware versions, enabling unauthorized access to system information.
Affected Systems and Versions
The affected systems include Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a specially crafted URL to the target device, bypassing authentication protocols.
Mitigation and Prevention
Discover the key steps to mitigate the risks posed by CVE-2023-35137 and prevent potential security breaches.
Immediate Steps to Take
Immediately update the affected Zyxel NAS326 and NAS542 firmware to the latest secure versions. Implement network segmentation to limit unauthorized access.
Long-Term Security Practices
Enhance overall network security by enforcing strong password policies, conducting regular security audits, and providing employee security awareness training.
Patching and Updates
Regularly check for security updates from Zyxel and apply patches promptly to ensure protection against known vulnerabilities.