CVE-2021-28844 : Exploit Details and Defense Strategies
Learn about CVE-2021-28844, a Null Pointer Dereference vulnerability in TRENDnet TEW models. Explore the impact, affected systems, and mitigation steps to protect your devices.
A Null Pointer Dereference vulnerability has been identified in TRENDnet wireless access points, potentially affecting several models. This vulnerability can be exploited by sending a crafted POST request to apply_cgi without a session_id key. Learn more about the impact, technical details, and mitigation steps below.
Understanding CVE-2021-28844
This section provides insights into the nature and implications of the vulnerability.
What is CVE-2021-28844?
The CVE-2021-28844 vulnerability involves a Null Pointer Dereference issue in multiple TRENDnet wireless access point models when processing specific types of requests.
The Impact of CVE-2021-28844
The vulnerability could allow an attacker to trigger a denial-of-service condition or potentially execute arbitrary code by exploiting the Null Pointer Dereference flaw.
Technical Details of CVE-2021-28844
Explore the specific technical aspects of the CVE-2021-28844 vulnerability.
Vulnerability Description
The vulnerability arises due to improper handling of requests in the apply_cgi function without the necessary session_id key, leading to a Null Pointer Dereference condition.
Affected Systems and Versions
The vulnerability affects TRENDnet wireless access point models including TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03.
Exploitation Mechanism
By sending a POST request to apply_cgi without the required session_id key, an attacker can exploit this vulnerability to initiate a Null Pointer Dereference condition.
Mitigation and Prevention
Discover the steps to mitigate the risks associated with CVE-2021-28844.
Immediate Steps to Take
It is recommended to apply patches or updates provided by TRENDnet to address this vulnerability promptly.
Long-Term Security Practices
Ensure regular monitoring and updating of access point firmware to protect against known vulnerabilities like CVE-2021-28844.
Patching and Updates
Stay informed about security advisories from TRENDnet and promptly apply any security patches released to safeguard your wireless access points.