Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2020-18382
CVE-2020-18382:
NixOS vulnerability analysis and mitigation
Overview
CVE-2020-18382 is a heap-buffer-overflow vulnerability discovered in Binaryen version 1.38.26, specifically in the wasm::WasmBinaryBuilder::visitBlock(wasm::Block*) function within /src/wasm/wasm-binary.cpp. The vulnerability was disclosed on August 22, 2023. When exploited, a specially crafted WebAssembly (wasm) input can trigger a segmentation fault, leading to denial-of-service conditions (GitHub Issue).
Technical details
The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The issue occurs in the visitBlock function where a heap buffer overflow can be triggered during the processing of WebAssembly binary code. The vulnerability is classified as CWE-787 (Out-of-bounds Write) (NVD).
Impact
When successfully exploited, this vulnerability can cause a segmentation fault in the wasm-opt tool, resulting in a denial-of-service condition. The attack primarily affects the availability of the system, with no direct impact on confidentiality or integrity (GitHub Issue).
Additional resources
Source: This report was generated using AI
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