Vulnerability Details : CVE-2023-27477
wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend, Cranelift, has a bug on x86_64 platforms for the WebAssembly `i8x16.select` instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indices are greater than 16. There is an off-by-one error in the calculation of the mask to the `pshufb` instruction which causes incorrect results to be returned if lanes are selected from the second vector. This codegen bug has been fixed in Wasmtiem 6.0.1, 5.0.1, and 4.0.1. Users are recommended to upgrade to these updated versions. If upgrading is not an option for you at this time, you can avoid this miscompilation by disabling the Wasm simd proposal. Additionally the bug is only present on x86_64 hosts. Other platforms such as AArch64 and s390x are not affected.
Products affected by CVE-2023-27477
- Bytecodealliance » Cranelift-codegen » For RustVersions from including (>=) 0.84.0 and before (<) 0.91.1cpe:2.3:a:bytecodealliance:cranelift-codegen:*:*:*:*:*:rust:*:*
- cpe:2.3:a:bytecodealliance:cranelift-codegen:0.93.0:*:*:*:*:rust:*:*
- cpe:2.3:a:bytecodealliance:cranelift-codegen:0.92.0:*:*:*:*:rust:*:*
- cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*
- cpe:2.3:a:bytecodealliance:wasmtime:6.0.0:*:*:*:*:rust:*:*
- cpe:2.3:a:bytecodealliance:wasmtime:5.0.0:*:*:*:*:rust:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-27477
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 52 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-27477
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
2.8
|
1.4
|
NIST | |
|
3.1
|
LOW | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N |
1.6
|
1.4
|
GitHub, Inc. |
CWE ids for CVE-2023-27477
-
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.Assigned by: security-advisories@github.com (Primary)
References for CVE-2023-27477
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https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-xm67-587q-r2vw
Miscompilation of `i8x16.select` with the same inputs on x86_64 · Advisory · bytecodealliance/wasmtime · GitHubMitigation;Patch;Vendor Advisory
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https://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/Mov-ItrNJsQ
Upcoming security release for WasmtimeMailing List;Release Notes;Vendor Advisory
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https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.wasm_simd
Config in wasmtime - RustProduct
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https://github.com/webassembly/simd
GitHub - WebAssembly/simd: Branch of the spec repo scoped to discussion of SIMD in WebAssemblyNot Applicable
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https://github.com/bytecodealliance/wasmtime/commit/5dc2bbccbb363e474d2c9a1b8e38a89a43bbd5d1
Merge pull request from GHSA-xm67-587q-r2vw · bytecodealliance/wasmtime@5dc2bbc · GitHubPatch
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