CVE-2021-28184 : Exploit Details and Defense Strategies
Learn about CVE-2021-28184, a buffer overflow vulnerability in ASUS BMC's firmware allowing remote attackers to disrupt Web services. Find mitigation steps and firmware updates to secure affected systems.
This CVE-2021-28184 article provides insights into a buffer overflow vulnerability in ASUS BMC's firmware affecting certain products, potentially exploited by remote attackers due to a lack of string length verification.
Understanding CVE-2021-28184
This section delves into the details of the vulnerability, its impacts, technical aspects, and mitigation strategies.
What is CVE-2021-28184?
The Active Directory configuration function in ASUS BMC's firmware Web management page is susceptible to a buffer overflow vulnerability, enabling remote attackers to exploit privileged permissions and disrupt Web services.
The Impact of CVE-2021-28184
The vulnerability's CVSS v3.1 base score is 4.9, with a medium severity rating. It poses a high risk to availability by allowing remote attackers to terminate the Web service abnormally.
Technical Details of CVE-2021-28184
This section outlines crucial technical details of the CVE, including its description, affected systems, and exploitation mechanisms.
Vulnerability Description
The vulnerability arises from the failure of ASUS BMC's firmware to validate user-entered string length, leading to a buffer overflow condition and potential Web service termination.
Affected Systems and Versions
Notable affected products include BMC firmware for Z10PR-D16, ASMB8-iKVM, and Z10PE-D16 WS, running specific versions vulnerable to exploitation.
Exploitation Mechanism
Remote attackers with high privileges can leverage the buffer overflow vulnerability in the Active Directory configuration function to cause service disruptions.
Mitigation and Prevention
This section provides essential steps to mitigate the CVE's risks, ensuring immediate and long-term security measures are in place.
Immediate Steps to Take
Users are advised to update ASUS BMC's firmware to the recommended versions for Z10PR-D16, ASMB8-iKVM, and Z10PE-D16 WS to prevent exploitation of the buffer overflow vulnerability.
Long-Term Security Practices
In addition to firmware updates, implementing secure coding practices, network segmentation, and access control policies can enhance the overall security posture.
Patching and Updates
Regularly monitoring ASUS security advisories and promptly applying firmware updates is crucial to address known vulnerabilities.