SB2024040267 - Type Confusion in Wasmtime

Description

This security bulletin contains information about 1 security vulnerability.

1) Type Confusion (CVE-ID: CVE-2024-30266)

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of type mismatches in element segments in Wasmtime table instruction handling when executing a crafted WebAssembly module that issues a table.* instruction using a dropped element segment with an externref-typed table. A local user can execute a specially crafted WebAssembly module to cause a denial of service.

The issue requires the reference-types WebAssembly feature to be enabled, and toolchains are not known to generate the triggering pattern by default.

Remediation

Install update from vendor's website.

References

• https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-75hq-h6g9-h4q5
• https://github.com/advisories/GHSA-75hq-h6g9-h4q5