CVE-2021-3297 : Vulnerability Insights and Analysis

A vulnerability has been discovered on Zyxel NBG2105 V1.00(AAGU.2)C0 devices that allows unauthorized users to gain administrator access by setting the login cookie to 1.

Understanding CVE-2021-3297

This CVE identifies a security issue on Zyxel NBG2105 devices that could result in a serious breach of privacy and security.

What is CVE-2021-3297?

The CVE-2021-3297 vulnerability affects Zyxel NBG2105 V1.00(AAGU.2)C0 devices, enabling attackers to bypass authentication and gain admin privileges by manipulating the login cookie.

The Impact of CVE-2021-3297

Exploiting this vulnerability could lead to unauthorized access to sensitive information, unauthorized configuration changes, and potential network compromise.

Technical Details of CVE-2021-3297

This section delves into the specifics of the vulnerability on Zyxel NBG2105 V1.00(AAGU.2)C0 devices.

Vulnerability Description

By setting the login cookie to 1, attackers can bypass authentication mechanisms and gain full administrator rights on the affected devices.

Affected Systems and Versions

Zyxel NBG2105 V1.00(AAGU.2)C0 devices are confirmed to be affected by this vulnerability, with the specified version being susceptible to the exploit.

Exploitation Mechanism

The exploitation of CVE-2021-3297 involves manipulating the login cookie to a specific value, thereby tricking the system into granting unauthorized admin access.

Mitigation and Prevention

To protect against the CVE-2021-3297 vulnerability, immediate actions and long-term security practices need to be implemented.

Immediate Steps to Take

Users of Zyxel NBG2105 V1.00(AAGU.2)C0 devices should refrain from setting the login cookie to 1 and apply all relevant security updates promptly.

Long-Term Security Practices

Implementing strong password policies, network segmentation, and regular security assessments can help prevent unauthorized access and mitigate security risks.

Patching and Updates

Zyxel has released patches to address the CVE-2021-3297 vulnerability. Users must ensure that their devices are updated with the latest security fixes to eliminate the risk of exploitation.