CVE-2019-7703 : Security Advisory and Response

Binaryen 1.38.22 has a use-after-free vulnerability in the

wasm::WasmBinaryBuilder::visitCall

function, allowing remote attackers to trigger a denial-of-service attack via a wasm file.

Understanding CVE-2019-7703

This CVE involves a specific vulnerability in Binaryen 1.38.22 that can be exploited by attackers to cause a denial-of-service attack.

What is CVE-2019-7703?

The issue in Binaryen 1.38.22 allows remote attackers to exploit a use-after-free vulnerability in the

wasm::WasmBinaryBuilder::visitCall

function, potentially leading to a denial-of-service attack through a wasm file.

The Impact of CVE-2019-7703

This vulnerability could be leveraged by malicious actors to initiate denial-of-service attacks, impacting the availability of services utilizing the affected Binaryen version.

Technical Details of CVE-2019-7703

Binaryen 1.38.22 is susceptible to a use-after-free flaw in the

wasm::WasmBinaryBuilder::visitCall

function.

Vulnerability Description

The vulnerability in Binaryen 1.38.22 allows remote attackers to exploit a use-after-free issue in the

wasm::WasmBinaryBuilder::visitCall

function, potentially leading to a denial-of-service attack.

Affected Systems and Versions

Product: Binaryen 1.38.22
Vendor: N/A
Version: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious wasm file to trigger the use-after-free condition in the

wasm::WasmBinaryBuilder::visitCall

function.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-7703.

Immediate Steps to Take

Update Binaryen to a patched version that addresses the use-after-free vulnerability.
Implement network security measures to prevent unauthorized access to vulnerable systems.

Long-Term Security Practices

Regularly update software and libraries to mitigate known vulnerabilities.
Conduct security assessments and audits to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security updates and patches released by Binaryen to address CVE-2019-7703.