Is CVE-2023-27477 in the CISA KEV catalog?

No. CVE-2023-27477 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-27477?

CVE-2023-27477 has a CVSS v3 base score of 3.1 (LOW).

What is the EPSS score for CVE-2023-27477?

CVE-2023-27477 has an EPSS score of 0.62% (45th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-27477?

Upgrade cranelift-codegen to 0.91.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2023-27477

LOW

3.1

CVSS v3

NVD

Description

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.

CWE-193

How to fix

Remediation Available

cranelift-codegenNVD

Affected:>= 0.84.0, < 0.91.1Fixed in:0.91.1CVE-2023-27477derived from NVD

wasmtimeNVD

Affected:>= 0.37.0, < 4.0.1Fixed in:4.0.1CVE-2023-27477derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.62%probability of exploitation in 30 days

45thpercentile

Moderate risk: more likely to be exploited than 45% of all known CVEs.

References

Patch2

Vendor Advisory1

groups.google.com

Product1

docs.rs

Other references1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.