CVE-2021-31227 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-31227, including its impact, technical details, mitigation strategies, and more.

Understanding CVE-2021-31227

CVE-2021-31227 is a vulnerability discovered in HCC embedded InterNiche 4.0.1, leading to a potential heap buffer overflow due to an incorrect signed integer comparison in parsing HTTP POST requests.

What is CVE-2021-31227?

CVE-2021-31227 involves a heap buffer overflow that occurs when processing malformed HTTP packets with a negative Content-Length, allowing attackers to trigger a large heap overflow in the wbs_multidata buffer copy.

The Impact of CVE-2021-31227

The vulnerability poses a significant risk as it could be exploited by malicious actors to execute arbitrary code, leading to a potential compromise of the affected system and sensitive data.

Technical Details of CVE-2021-31227

The technical aspects of CVE-2021-31227 include a detailed description of the vulnerability, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from an incorrect signed integer comparison during the parsing of HTTP POST requests, allowing for a heap buffer overflow in the wbs_multidata buffer copy.

Affected Systems and Versions

The issue impacts HCC embedded InterNiche version 4.0.1, exposing systems with this configuration to the risk of exploitation through crafted HTTP packets.

Exploitation Mechanism

Attackers can exploit CVE-2021-31227 by sending specially crafted HTTP packets with a negative Content-Length value, bypassing size checks and triggering the heap overflow.

Mitigation and Prevention

To address CVE-2021-31227, immediate steps should be taken to secure vulnerable systems and implement long-term security practices.

Immediate Steps to Take

System administrators are advised to apply relevant patches, monitor network traffic for suspicious activities, and restrict access to potentially vulnerable services.

Long-Term Security Practices

Implementing network segmentation, regularly updating software and firmware, conducting security audits, and educating users on safe computing practices can enhance overall system security.

Patching and Updates

Vendors may release security patches and updates to remediate CVE-2021-31227; it is crucial to promptly apply these patches to mitigate the risk of exploitation.