CVE-2023-27477

Published Mar 8, 2023

Last updated 2 years ago

Overview

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.
Source: security-advisories@github.com
NVD status: Analyzed

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 4.3
Impact score: 1.4
Exploitability score: 2.8
Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Severity: MEDIUM

Weaknesses

security-advisories@github.com: CWE-193

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:bytecodealliance:cranelift-codegen:*:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "DBCFE132-FEDA-4A43-AE02-08E150E411D7",
            "versionEndExcluding": "0.91.1",
            "versionStartIncluding": "0.84.0"
          },
          {
            "criteria": "cpe:2.3:a:bytecodealliance:cranelift-codegen:0.92.0:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "7D7B0DE4-0071-4056-A243-D0BB71963F93"
          },
          {
            "criteria": "cpe:2.3:a:bytecodealliance:cranelift-codegen:0.93.0:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "0EC7D2FC-6423-45AE-8F82-A37F93C17285"
          },
          {
            "criteria": "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "DD965E87-91DE-4FD2-8AED-37274050D01F",
            "versionEndExcluding": "4.0.1",
            "versionStartIncluding": "0.37.0"
          },
          {
            "criteria": "cpe:2.3:a:bytecodealliance:wasmtime:5.0.0:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "87B4AC93-F648-4E7B-9FC7-53D885110E35"
          },
          {
            "criteria": "cpe:2.3:a:bytecodealliance:wasmtime:6.0.0:*:*:*:*:rust:*:*",
            "vulnerable": true,
            "matchCriteriaId": "A21E7233-1DAD-449F-A48F-05BE3DE8E2E0"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Social media

Risk scores

CVSS 3.1

Weaknesses

Configurations

References