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CVE-2022-23636

5.1 · MEDIUM

Wasmtime is an open source runtime for WebAssembly & WASI.

Published Feb 16, 2022CWE-824EPSS 0.77%

Overview

CVE-2022-23636 is a medium-severity vulnerability. It was published on February 16, 2022 and has a CVSS 3.1 base score of 5.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

Wasmtime is an open source runtime for WebAssembly & WASI. Prior to versions 0.34.1 and 0.33.1, there exists a bug in the pooling instance allocator in Wasmtime's runtime where a failure to instantiate an instance for a module that defines an `externref` global will result in an invalid drop of a `VMExternRef` via an uninitialized pointer. A number of conditions listed in the GitHub Security Advisory must be true in order for an instance to be vulnerable to this issue. Maintainers believe that the effective impact of this bug is relatively small because the usage of `externref` is still uncommon and without a resource limiter configured on the `Store`, which is not the default configuration, it is only possible to trigger the bug from an error returned by `mprotect` or `VirtualAlloc`. Note that on Linux with the `uffd` feature enabled, it is only possible to trigger the bug from a resource limiter as the call to `mprotect` is skipped. The bug has been fixed in 0.34.1 and 0.33.1 and use

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/bytecodealliance/wasmtime/commit/886ecc562040bef61faf19438c22285c2d62403aGitHubgithub.com/bytecodealliance/wasmtime/security/advisories/GHSA-88xq-w8cq-xfg7GitHubgithub.com/bytecodealliance/wasmtime/commit/886ecc562040bef61faf19438c22285c2d62403aGitHubgithub.com/bytecodealliance/wasmtime/security/advisories/GHSA-88xq-w8cq-xfg7

How CyberStrike helps

Frequently asked questions

What is CVE-2022-23636?

CVE-2022-23636 is a medium-severity vulnerability. It was published on February 16, 2022 and has a CVSS 3.1 base score of 5.1 (MEDIUM).

How severe is CVE-2022-23636?

This vulnerability has a CVSS 3.1 base score of 5.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-23636?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-23636?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-23636 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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