CVE-2021-3674 : Exploit Details and Defense Strategies

A flaw was found in rizin that can lead to memory corruption and possible code execution due to out of bounds reads. This CVE affects rizin versions after v0.2.1 until commit 1e0c34946dddf9b8e5e63933aefacf2b26d08103.

Understanding CVE-2021-3674

This section provides insights into the impact and technical details of CVE-2021-3674.

What is CVE-2021-3674?

The create_section_from_phdr function in rizin allocates space for ELF section data by processing the headers. Crafted header values can cause out of bounds reads, leading to memory corruption and potential code execution.

The Impact of CVE-2021-3674

The vulnerability can result in memory corruption and potentially allow attackers to execute arbitrary code through the binary object's callback function.

Technical Details of CVE-2021-3674

This section delves into the vulnerability description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability in rizin allows for out of bounds reads, leading to memory corruption and potential code execution.

Affected Systems and Versions

This CVE affects rizin versions after v0.2.1 until commit 1e0c34946dddf9b8e5e63933aefacf2b26d08103.

Exploitation Mechanism

Crafted values in the headers can trigger out of bounds reads, which may result in memory corruption and code execution.

Mitigation and Prevention

This section outlines steps to mitigate and prevent exploitation of CVE-2021-3674.

Immediate Steps to Take

Users are advised to update rizin to a secure version and monitor for any unusual behavior.

Long-Term Security Practices

Implement secure coding practices and regularly update software to mitigate similar vulnerabilities in the future.

Patching and Updates

To address CVE-2021-3674, users should apply patches provided by the rizin project and stay informed about security updates.