CVE-2021-3466 Explained : Impact and Mitigation
Learn about CVE-2021-3466, a flaw in libmicrohttpd that allows remote attackers to trigger a buffer overflow. Only version 0.9.70 is affected. Understand the impact, technical details, and mitigation steps.
A flaw in libmicrohttpd allows a remote attacker to trigger a buffer overflow by exploiting a missing bounds check. This can lead to arbitrary data being written in the application. Read on to understand the impact, technical details, and mitigation steps.
Understanding CVE-2021-3466
This section delves into the details of the vulnerability.
What is CVE-2021-3466?
The vulnerability in libmicrohttpd results from a missing bounds check in the post_process_urlencoded function, enabling a buffer overflow. Attackers can exploit this to write arbitrary data in affected applications, posing risks to data confidentiality, integrity, and system availability. Notably, only version 0.9.70 of libmicrohttpd is susceptible.
The Impact of CVE-2021-3466
The primary threat posed by this vulnerability is the compromise of data confidentiality, integrity, and the availability of affected systems. Given the potential for a remote attacker to execute arbitrary code, the risks are significant.
Technical Details of CVE-2021-3466
Explore the technical aspects of this security flaw.
Vulnerability Description
The vulnerability arises from a missing bounds check in the post_process_urlencoded function of libmicrohttpd, leading to a buffer overflow.
Affected Systems and Versions
Only version 0.9.70 of libmicrohttpd is impacted by this vulnerability.
Exploitation Mechanism
Remote attackers can exploit this flaw to trigger a buffer overflow, enabling them to write arbitrary data in applications using libmicrohttpd.
Mitigation and Prevention
Discover the steps to mitigate and prevent exploitation of CVE-2021-3466.
Immediate Steps to Take
Developers and system administrators are advised to apply relevant patches or updates promptly to address the vulnerability. Consider implementing network-based controls to limit exposure.
Long-Term Security Practices
Ensuring timely security updates, conducting regular security assessments, and implementing secure coding practices can enhance the overall security posture of an organization.
Patching and Updates
Stay informed about security advisories and updates from libmicrohttpd to promptly apply security patches that address CVE-2021-3466.