CVE-2019-7152 : Vulnerability Insights and Analysis

An issue of heap-based buffer over-read was found in the function wasm::WasmBinaryBuilder::processFunctions() in the Binaryen version 1.38.22, leading to denial-of-service through segmentation faults triggered by manipulated input.

Understanding CVE-2019-7152

What is CVE-2019-7152?

This CVE identifies a heap-based buffer over-read vulnerability in the Binaryen version 1.38.22, specifically in the function wasm::WasmBinaryBuilder::processFunctions().

The Impact of CVE-2019-7152

The vulnerability can be exploited to cause segmentation faults, potentially resulting in denial-of-service conditions. An attacker can achieve this by providing manipulated input to the vulnerable function.

Technical Details of CVE-2019-7152

Vulnerability Description

The issue occurs in the wasm::WasmBinaryBuilder::processFunctions() function when calling wasm::WasmBinaryBuilder::getFunctionIndexName, allowing for a heap-based buffer over-read.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Binaryen 1.38.22

Exploitation Mechanism

By providing manipulated input to the vulnerable function, wasm::WasmBinaryBuilder::processFunctions(), attackers can trigger segmentation faults, leading to denial-of-service.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest patches or updates provided by Binaryen to address the vulnerability.
Avoid running untrusted WebAssembly code to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update and patch all software components to prevent known vulnerabilities.
Implement input validation mechanisms to sanitize user inputs and prevent buffer over-read vulnerabilities.

Patching and Updates

Ensure that Binaryen is updated to a version that includes a fix for the heap-based buffer over-read vulnerability.