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CVE-2024-38358

Status: DeferredLow (2.9)—

Wasmer is a web assembly (wasm) Runtime supporting WASIX, WASI and Emscripten. If the preopened directory has a symlink pointing outside, WASI programs can traverse the symlink and access host filesystem if the caller sets both `oflags::creat` and `rights::fd_write`. Programs can also crash the runtime by creating a symlink pointing outside with `path_symlink` and `path_open`ing the link. This issue has been addressed in commit `b9483d022` which has been included in release version 4.3.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Wasmer — WasmerAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2024-38358",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-38358",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-06-28T13:23:16.763480Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 2.9,
          "attackVector": "LOCAL",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 1.4
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "wasmerio",
          "product": "wasmer",
          "versions": [
            {
              "status": "affected",
              "version": "< 4.3.2"
            }
          ]
        }
      ]
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:wasmer:wasmer:*:*:*:*:*:rust:*:*"
          ],
          "vendor": "wasmer",
          "product": "wasmer",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "4.3.2",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
    }
  ],
  "published": "2024-06-19T20:15:11.990",
  "references": [
    {
      "url": "https://github.com/wasmerio/wasmer/commit/b9483d022c602b994103f78ecfe46f017f8ac662",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/wasmerio/wasmer/security/advisories/GHSA-55f3-3qvg-8pv5",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/wasmerio/wasmer/commit/b9483d022c602b994103f78ecfe46f017f8ac662",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/wasmerio/wasmer/security/advisories/GHSA-55f3-3qvg-8pv5",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wasmer is a web assembly (wasm) Runtime supporting WASIX, WASI and Emscripten. If the preopened directory has a symlink pointing outside, WASI programs can traverse the symlink and access host filesystem if the caller sets both `oflags::creat` and `rights::fd_write`. Programs can also crash the runtime by creating a symlink pointing outside with `path_symlink` and `path_open`ing the link. This issue has been addressed in commit `b9483d022` which has been included in release version 4.3.2. Users are advised to upgrade. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "Wasmer es un tiempo de ejecución de ensamblaje web (wasm) que admite WASIX, WASI y Emscripten. Si el directorio preabierto tiene un enlace simbólico que apunta hacia afuera, los programas WASI pueden atravesar el enlace simbólico y acceder al sistema de archivos del host si la persona que llama configura tanto `oflags::creat` como `rights::fd_write`. Los programas también pueden bloquear el tiempo de ejecución al crear un enlace simbólico que apunte hacia afuera con `path_symlink` y `path_open` en el enlace. Este problema se solucionó en el commit `b9483d022` que se incluyó en la versión 4.3.2. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T07:39:59.320",
  "sourceIdentifier": "security-advisories@github.com"
}