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CVE-2021-21723 : Security Advisory and Response

Learn about CVE-2021-21723, a DoS vulnerability impacting ZTE products like ZXR10 9904, 9908, 9916, 9904-S, and 9908-S. Find out about the impact, technical details, and mitigation steps.

This CVE-2021-21723 article provides details about a Denial of Service (DoS) vulnerability found in certain ZTE products, leading to a potential device shutdown due to memory leaks.

Understanding CVE-2021-21723

This section delves into the specifics of the CVE-2021-21723 vulnerability and its impact on ZTE products.

What is CVE-2021-21723?

CVE-2021-21723 entails a DoS vulnerability in ZTE products caused by memory release mishandling, allowing remote attackers to trigger a series of operations, resulting in memory leaks and potential device shutdown.

The Impact of CVE-2021-21723

The vulnerability poses a risk of device denial of service, affecting ZTE products such as ZXR10 9904, ZXR10 9908, ZXR10 9916, ZXR10 9904-S, and ZXR10 9908-S, across all versions up to V1.01.10.B12.

Technical Details of CVE-2021-21723

Explore the technical aspects surrounding the CVE-2021-21723 vulnerability affecting ZTE products.

Vulnerability Description

The vulnerability stems from improper memory release handling in specific scenarios, enabling remote exploitation for initiating memory leaks and potential DoS attacks.

Affected Systems and Versions

ZTE products impacted include ZXR10 9904, ZXR10 9908, ZXR10 9916, ZXR10 9904-S, and ZXR10 9908-S, spanning all versions up to V1.01.10.B12.

Exploitation Mechanism

Remote attackers can take advantage of the vulnerability by executing a sequence of actions that trigger memory leaks, eventually leading to potential device shutdown.

Mitigation and Prevention

Discover the essential steps to mitigate and prevent the CVE-2021-21723 vulnerability affecting ZTE products.

Immediate Steps to Take

To mitigate the risk, users are advised to implement appropriate security measures and monitor for any unusual activity that could indicate a DoS attack.

Long-Term Security Practices

Establishing robust security protocols, conducting regular vulnerability assessments, and staying informed about security updates are crucial for safeguarding against potential threats.

Patching and Updates

Users should promptly apply patches and updates provided by ZTE to address the CVE-2021-21723 vulnerability and enhance the security of the affected products.

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