CVE-2021-28187 : Vulnerability Insights and Analysis
Learn about CVE-2021-28187 affecting ASUS BMC's firmware, a buffer overflow vulnerability allowing remote attackers to disrupt Web service. Find mitigation steps here.
ASUS BMC's firmware is affected by a buffer overflow vulnerability in the 'Generate new SSL certificate' function. Remote attackers can exploit this issue to cause a denial of service by terminating the Web service abnormally.
Understanding CVE-2021-28187
This CVE details a security flaw in ASUS BMC's firmware that allows for remote attacks leveraging a buffer overflow vulnerability.
What is CVE-2021-28187?
The vulnerability lies in the Web management page of ASUS BMC's firmware, where the function to generate new SSL certificates lacks proper user input validation, leading to a buffer overflow.
The Impact of CVE-2021-28187
With a CVSS base score of 4.9 (Medium severity), the vulnerability poses a high availability impact, allowing attackers with high privileges to disrupt the Web service.
Technical Details of CVE-2021-28187
The vulnerability allows remote attackers to exploit buffer overflow in ASUS BMC firmware's Web management page, leading to service termination.
Vulnerability Description
The Web management page of ASUS BMC's firmware fails to validate user input string lengths, enabling a buffer overflow, granting attackers the ability to disrupt Web services.
Affected Systems and Versions
- BMC firmware for Z10PR-D16 version 1.14.51
- BMC firmware for ASMB8-iKVM version 1.14.51
- BMC firmware for Z10PE-D16 WS version 1.14.2
Exploitation Mechanism
Remote attackers with high privileges can leverage the buffer overflow vulnerability in ASUS BMC firmware's Web management page to disrupt the Web service.
Mitigation and Prevention
To address CVE-2021-28187, it is crucial to update the affected BMC firmware versions to prevent exploitation and enhance system security.
Immediate Steps to Take
Update BMC's firmware to the following versions:
- Z10PR-D16 1.16.1
- ASMB8-iKVM 1.16.1
- Z10PE-D16 WS 1.16.1
Long-Term Security Practices
Regularly monitor and update firmware to fix security issues and prevent vulnerabilities like buffer overflows.
Patching and Updates
Stay informed about security advisories from ASUS and apply firmware patches promptly to ensure system integrity and protection.