Vulnerability-Lookup

rustsec-2022-0100

Vulnerability from osv_rustsec

Published

2022-07-12 12:00

Modified

2025-05-02 08:23

Summary

Use After Free with `externref`s in Wasmtime

Details

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g. For more information see the GitHub-hosted security advisory.

JSON

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{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "memory-corruption"
        ],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "wasmtime",
        "purl": "pkg:cargo/wasmtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.38.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "CVE-2022-31146",
    "GHSA-5fhj-g3p3-pq9g"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g.\nFor more information see the GitHub-hosted security advisory.",
  "id": "RUSTSEC-2022-0100",
  "modified": "2025-05-02T08:23:27Z",
  "published": "2022-07-12T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/wasmtime"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2022-0100.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Use After Free with `externref`s in Wasmtime"
}

GHSA-5FHJ-G3P3-PQ9G

Vulnerability from github – Published: 2022-07-20 22:47 – Updated: 2025-05-02 12:48

Summary

Wasmtime vulnerable to Use After Free with `externref`s

Details

There is a bug in Wasmtime's code generator, Cranelift, where functions using reference types may be incorrectly missing metadata required for runtime garbage collection (GC). This means that if a GC happens at runtime then the collector will mistakenly think some Wasm stack frames do not have live references to garbage collected values and therefore reclaim and deallocate them. The function can then subsequently continue to use the values, leading later to use-after-free bugs. This bug was introduced in Cranelift's migration to the regalloc2 register allocator in the Wasmtime 0.37.0 release on 2022-05-20. This bug has been patched and users should upgrade to Wasmtime version 0.38.2.

Mitigations for this issue can be achieved by doing one of:

Disabling the reference types proposal by passing false to wasmtime::Config::wasm_reference_types.
Downgrading to Wasmtime 0.36.0 or prior.

Severity ?

6.4 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "wasmtime"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.37.0"
            },
            {
              "fixed": "0.38.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "cranelift-codegen"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.84.0"
            },
            {
              "fixed": "0.85.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-31146"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-07-20T22:47:13Z",
    "nvd_published_at": "2022-07-21T04:15:00Z",
    "severity": "MODERATE"
  },
  "details": "There is a bug in Wasmtime\u0027s code generator, Cranelift, where functions using reference types may be incorrectly missing metadata required for runtime garbage collection (GC). This means that if a GC happens at runtime then the collector will mistakenly think some Wasm stack frames do not have live references to garbage collected values and therefore reclaim and deallocate them. The function can then subsequently continue to use the values, leading later to use-after-free bugs. This bug was introduced in Cranelift\u0027s migration to the `regalloc2` register allocator in the Wasmtime 0.37.0 release on 2022-05-20. This bug has been patched and users should upgrade to Wasmtime version 0.38.2.\n\nMitigations for this issue can be achieved by doing one of:\n\n* Disabling the reference types proposal by passing `false` to [`wasmtime::Config::wasm_reference_types`](https://docs.rs/wasmtime/0.38.0/wasmtime/struct.Config.html#method.wasm_reference_types).\n* Downgrading to Wasmtime 0.36.0 or prior.",
  "id": "GHSA-5fhj-g3p3-pq9g",
  "modified": "2025-05-02T12:48:59Z",
  "published": "2022-07-20T22:47:13Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-31146"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bytecodealliance/wasmtime/commit/2ba4bce5cc719e5a74e571a534424614e62ecc41"
    },
    {
      "type": "WEB",
      "url": "https://github.com/WebAssembly/reference-types"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bytecodealliance/wasmtime"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2022-0100.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Wasmtime vulnerable to Use After Free with `externref`s"
}

CVE-2022-31146 (GCVE-0-2022-31146)

Vulnerability from cvelistv5 – Published: 2022-07-20 22:30 – Updated: 2025-04-23 17:57

Title

Use After Free in Wasmtime

Summary

Wasmtime is a standalone runtime for WebAssembly. There is a bug in the Wasmtime's code generator, Cranelift, where functions using reference types may be incorrectly missing metadata required for runtime garbage collection. This means that if a GC happens at runtime then the GC pass will mistakenly think these functions do not have live references to GC'd values, reclaiming them and deallocating them. The function will then subsequently continue to use the values assuming they had not been GC'd, leading later to a use-after-free. This bug was introduced in the migration to the `regalloc2` register allocator that occurred in the Wasmtime 0.37.0 release on 2022-05-20. This bug has been patched and users should upgrade to Wasmtime version 0.38.2. Mitigations for this issue can be achieved by disabling the reference types proposal by passing `false` to `wasmtime::Config::wasm_reference_types` or downgrading to Wasmtime 0.36.0 or prior.

Severity ?

6.4 (Medium)


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

CWE

CWE-416 - Use After Free

Assigner

GitHub_M

References

URL

Tags

	https://github.com/bytecodealliance/wasmtime/secu…	x_refsource_CONFIRM
	https://github.com/WebAssembly/reference-types	x_refsource_MISC
	https://github.com/bytecodealliance/wasmtime/	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	bytecodealliance	wasmtime	Affected: >= 0.37.0, < 0.38.2 Affected: >= 0.84.0, < 0.85.2

Show details on NVD website

JSON

To clipboard

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  "containers": {
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          "dateUpdated": "2024-08-03T07:11:39.649Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-5fhj-g3p3-pq9g"
          },
          {
            "tags": [
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            ],
            "url": "https://github.com/WebAssembly/reference-types"
          },
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/bytecodealliance/wasmtime/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-31146",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-23T14:03:18.900742Z",
                "version": "2.0.3"
              },
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            }
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        ],
        "providerMetadata": {
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          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "wasmtime",
          "vendor": "bytecodealliance",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.37.0, \u003c 0.38.2"
            },
            {
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            }
          ]
        }
      ],
      "descriptions": [
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        }
      ],
      "metrics": [
        {
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            "attackComplexity": "HIGH",
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            "availabilityImpact": "LOW",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
          }
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      ],
      "problemTypes": [
        {
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      "providerMetadata": {
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        },
        {
          "tags": [
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          "url": "https://github.com/WebAssembly/reference-types"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/bytecodealliance/wasmtime/"
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      "source": {
        "advisory": "GHSA-5fhj-g3p3-pq9g",
        "discovery": "UNKNOWN"
      },
      "title": "Use After Free in Wasmtime",
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                            "version_name": "",
                            "version_value": "\u003e= 0.37.0, \u003c 0.38.2"
                          },
                          {
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            }
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        "impact": {
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    "datePublished": "2022-07-20T22:30:16.000Z",
    "dateReserved": "2022-05-18T00:00:00.000Z",
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  },
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

rustsec-2022-0100

Vulnerability from osv_rustsec

GHSA-5FHJ-G3P3-PQ9G

CVE-2022-31146 (GCVE-0-2022-31146)

Tags

Sightings

Nomenclature