#VU75586 Reliance on undefined behavior in Wasmtime - CVE-2023-30624

Vulnerability identifier: #VU75586

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-30624

CWE-ID: CWE-758

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 influence application's behavior.

The vulnerability exists due to LLVM-level undefined behavior when managing per-instance state. A remote attacker can leverage this vulnerability to cause runtime-level issues when compiled with LLVM 16, which can influence application behavior.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Wasmtime: 6.0.0 - 8.0.0

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External links
https://github.com/bytecodealliance/wasmtime/commit/0977952dcd9d482bff7c288868ccb52769b3a92e
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-ch89-5g45-qwc7

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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