CVE-2019-7700 : What You Need to Know
Learn about CVE-2019-7700, a heap-based buffer over-read vulnerability in Binaryen 1.38.22, allowing attackers to trigger a denial-of-service condition. Find out how to mitigate and prevent exploitation.
Binaryen 1.38.22 was found to have a vulnerability related to a heap-based buffer over-read in the function wasm::WasmBinaryBuilder::visitCall, leading to a denial-of-service condition when manipulated wasm input is provided.
Understanding CVE-2019-7700
What is CVE-2019-7700?
This CVE identifies a heap-based buffer over-read vulnerability in Binaryen 1.38.22, specifically in the function wasm::WasmBinaryBuilder::visitCall.
The Impact of CVE-2019-7700
The vulnerability can be exploited by an attacker to trigger a segmentation fault, resulting in a denial-of-service condition.
Technical Details of CVE-2019-7700
Vulnerability Description
A heap-based buffer over-read was discovered in wasm::WasmBinaryBuilder::visitCall in wasm-binary.cpp in Binaryen 1.38.22. A crafted wasm input can cause a segmentation fault, leading to denial-of-service.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Version: Not applicable
Exploitation Mechanism
The issue can be exploited by providing manipulated wasm input, as demonstrated through wasm-merge.
Mitigation and Prevention
Immediate Steps to Take
- Apply patches or updates provided by the vendor.
- Avoid running untrusted wasm code.
Long-Term Security Practices
- Regularly update software and dependencies.
- Implement input validation and sanitization mechanisms.
Patching and Updates
Ensure that Binaryen is updated to a version that addresses the heap-based buffer over-read vulnerability.