CVE-2021-35041 Explained : Impact and Mitigation

A blockchain node in FISCO-BCOS V2.7.2 is vulnerable to a bug when processing unformatted packets, potentially leading to a crash if a malicious node continuously sends malformed packets. This could result in sustained memory consumption and system crashes.

Understanding CVE-2021-35041

This section explores the details and impact of the CVE-2021-35041 vulnerability.

What is CVE-2021-35041?

The vulnerability in the blockchain node of FISCO-BCOS V2.7.2 allows a malicious node to send incorrectly formatted packets, causing memory exhaustion and system crashes.

The Impact of CVE-2021-35041

The vulnerability may be exploited by attackers to disrupt system availability by crashing the blockchain node through sustained memory consumption.

Technical Details of CVE-2021-35041

Here, we delve into the technical aspects of the CVE-2021-35041 vulnerability.

Vulnerability Description

The bug in FISCO-BCOS V2.7.2 permits a continuous flow of unformatted packets, which cannot be processed correctly, leading to memory exhaustion and crashes.

Affected Systems and Versions

The vulnerability affects FISCO-BCOS V2.7.2 blockchain nodes.

Exploitation Mechanism

Attackers exploit the flaw by sending malformed packets continuously, triggering memory consumption issues and system crashes.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-35041.

Immediate Steps to Take

Administrators should monitor network traffic and implement filtering mechanisms to block malformed packets.

Long-Term Security Practices

Regularly update and patch the blockchain node software to address known vulnerabilities and improve system resilience.

Patching and Updates

Apply vendor-supplied patches promptly to fix the vulnerability and prevent potential exploitation.