#VU73808 Input validation error in Wasmtime - CVE-2023-27477

Vulnerability identifier: #VU73808

Vulnerability risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-27477

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Wasmtime
Web applications / Modules and components for CMS

Vendor: Bytecode Alliance

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to miscompilation of "i8x16.select" with the same inputs on x86_64. A remote user can cause the WebAssembly instruction to produce incorrect results for the i8x16.select instruction.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Wasmtime: 0.2.0 - 6.0.0

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External links
https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.wasm_simd
https://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/Mov-ItrNJsQ
https://github.com/webassembly/simd
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-xm67-587q-r2vw
https://github.com/bytecodealliance/wasmtime/commit/5dc2bbccbb363e474d2c9a1b8e38a89a43bbd5d1

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.