CVE-2021-21887 : Vulnerability Insights and Analysis
Learn about CVE-2021-21887, a critical stack-based buffer overflow vulnerability in Lantronix PremierWave 2050 8.9.0.0R4, allowing remote code execution via HTTP requests. Find mitigation steps here.
A stack-based buffer overflow vulnerability has been identified in the Web Manager SslGenerateCSR function of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU), allowing a specially crafted HTTP request to trigger remote code execution by an attacker.
Understanding CVE-2021-21887
This section explains the details and impact of the CVE-2021-21887 vulnerability.
What is CVE-2021-21887?
The CVE-2021-21887 vulnerability is a stack-based buffer overflow issue in the Web Manager SslGenerateCSR function of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). This flaw can be exploited through a specifically designed HTTP request, enabling an attacker to execute remote code after making an authenticated HTTP request.
The Impact of CVE-2021-21887
With a CVSS base score of 9.1 (Critical), this vulnerability poses a significant threat. It has a high impact on integrity, availability, and confidentiality, with privileges required for exploitation being high and no user interaction necessary.
Technical Details of CVE-2021-21887
This section provides technical insights into the vulnerability.
Vulnerability Description
The vulnerability is classified as a stack-based buffer overflow (CWE-121) in the Web Manager SslGenerateCSR function of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU).
Affected Systems and Versions
The affected product is Lantronix PremierWave 2050, specifically version 8.9.0.0R4 (in QEMU).
Exploitation Mechanism
Exploitation requires a specially crafted HTTP request, through which remote code execution can be triggered.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent exploitation of CVE-2021-21887.
Immediate Steps to Take
Users are advised to apply security patches or updates provided by Lantronix to remediate this vulnerability immediately.
Long-Term Security Practices
Implementing network segmentation, access controls, and regular security updates can help enhance the overall security posture.
Patching and Updates
Regularly check for and apply security patches and updates from the vendor to address known vulnerabilities and protect systems from potential risks.