CVE-2019-7702 : Vulnerability Insights and Analysis

Binaryen 1.38.22 contains a vulnerability in the function wasm::SExpressionWasmBuilder::parseExpression that can lead to a denial-of-service condition when exploited through a crafted WebAssembly input.

Understanding CVE-2019-7702

This CVE involves a NULL pointer dereference in Binaryen 1.38.22, potentially resulting in a segmentation fault and denial-of-service.

What is CVE-2019-7702?

The vulnerability in Binaryen 1.38.22 allows for a NULL pointer dereference in the function wasm::SExpressionWasmBuilder::parseExpression, triggered by a maliciously crafted WebAssembly input.

The Impact of CVE-2019-7702

Exploiting this vulnerability can lead to a denial-of-service condition due to a segmentation fault, affecting the availability of the application.

Technical Details of CVE-2019-7702

Binaryen 1.38.22 is susceptible to a NULL pointer dereference in the wasm::SExpressionWasmBuilder::parseExpression function.

Vulnerability Description

The vulnerability in wasm-s-parser.cpp can be triggered by providing a specially crafted WebAssembly input, potentially causing a segmentation fault.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: Not applicable

Exploitation Mechanism

By supplying a maliciously crafted input in WebAssembly format, attackers can trigger the vulnerability, leading to a denial-of-service condition.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-7702.

Immediate Steps to Take

Apply patches or updates provided by the vendor promptly.
Monitor security advisories for any new information or updates related to this vulnerability.

Long-Term Security Practices

Regularly update software and libraries to mitigate potential vulnerabilities.
Implement input validation mechanisms to prevent malicious inputs.

Patching and Updates

Ensure that Binaryen is updated to a patched version that addresses the NULL pointer dereference vulnerability.