Vulnerability-Lookup

CVE-2024-43367 (GCVE-0-2024-43367)

Vulnerability from cvelistv5 – Published: 2024-08-15 20:38 – Updated: 2024-08-20 15:45

Title

Boa has an uncaught exception when transitioning the state of `AsyncGenerator` objects

Summary

Boa is an embeddable and experimental Javascript engine written in Rust. Starting in version 0.16 and prior to version 0.19.0, a wrong assumption made when handling ECMAScript's `AsyncGenerator` operations can cause an uncaught exception on certain scripts. Boa's implementation of `AsyncGenerator` makes the assumption that the state of an `AsyncGenerator` object cannot change while resolving a promise created by methods of `AsyncGenerator` such as `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, or `%AsyncGeneratorPrototype%.throw`. However, a carefully constructed code could trigger a state transition from a getter method for the promise's `then` property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user. Version 0.19.0 is patched to correctly handle this case. Users unable to upgrade to the patched version would want to use `std::panic::catch_unwind` to ensure any exceptions caused by the engine don't impact the availability of the main application.

Severity ?

7.5 (High)


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

CWE

CWE-248 - Uncaught Exception

Assigner

GitHub_M

References

URL

Tags

	https://github.com/boa-dev/boa/security/advisorie…	x_refsource_CONFIRM
	https://github.com/tc39/ecma262/security/advisori…	x_refsource_MISC
	https://github.com/boa-dev/boa/commit/69ea2f52ed9…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	boa-dev	boa	Affected: >= 0.16, < 0.19.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:boa:boa:*:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "boa",
            "vendor": "boa",
            "versions": [
              {
                "lessThanOrEqual": "0.16",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              },
              {
                "lessThanOrEqual": "0.19.0",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-43367",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-08-20T15:42:47.405347Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-08-20T15:45:24.595Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "boa",
          "vendor": "boa-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.16, \u003c 0.19.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Boa is an embeddable and experimental Javascript engine written in Rust. Starting in version 0.16 and prior to version 0.19.0, a wrong assumption made when handling ECMAScript\u0027s `AsyncGenerator` operations can cause an uncaught exception on certain scripts. Boa\u0027s implementation of `AsyncGenerator` makes the assumption that the state of an `AsyncGenerator` object cannot change while resolving a promise created by methods of `AsyncGenerator` such as `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, or `%AsyncGeneratorPrototype%.throw`. However, a carefully constructed code could trigger a state transition from a getter method for the promise\u0027s `then` property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user. Version 0.19.0 is patched to correctly handle this case. Users unable to upgrade to the patched version would want to use `std::panic::catch_unwind` to ensure any exceptions caused by the engine don\u0027t impact the availability of the main application."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-248",
              "description": "CWE-248: Uncaught Exception",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-08-15T20:38:23.530Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq"
        },
        {
          "name": "https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r"
        },
        {
          "name": "https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7"
        }
      ],
      "source": {
        "advisory": "GHSA-f67q-wr6w-23jq",
        "discovery": "UNKNOWN"
      },
      "title": "Boa has an uncaught exception when transitioning the state of `AsyncGenerator` objects"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-43367",
    "datePublished": "2024-08-15T20:38:23.530Z",
    "dateReserved": "2024-08-09T14:23:55.513Z",
    "dateUpdated": "2024-08-20T15:45:24.595Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Boa has an uncaught exception when transitioning the state of `AsyncGenerator` objects\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-248\", \"lang\": \"en\", \"description\": \"CWE-248: Uncaught Exception\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq\"}, {\"name\": \"https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r\"}, {\"name\": \"https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7\"}], \"affected\": [{\"vendor\": \"boa-dev\", \"product\": \"boa\", \"versions\": [{\"version\": \"\u003e= 0.16, \u003c 0.19.0\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-08-15T20:38:23.530Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Boa is an embeddable and experimental Javascript engine written in Rust. Starting in version 0.16 and prior to version 0.19.0, a wrong assumption made when handling ECMAScript\u0027s `AsyncGenerator` operations can cause an uncaught exception on certain scripts. Boa\u0027s implementation of `AsyncGenerator` makes the assumption that the state of an `AsyncGenerator` object cannot change while resolving a promise created by methods of `AsyncGenerator` such as `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, or `%AsyncGeneratorPrototype%.throw`. However, a carefully constructed code could trigger a state transition from a getter method for the promise\u0027s `then` property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user. Version 0.19.0 is patched to correctly handle this case. Users unable to upgrade to the patched version would want to use `std::panic::catch_unwind` to ensure any exceptions caused by the engine don\u0027t impact the availability of the main application.\"}], \"source\": {\"advisory\": \"GHSA-f67q-wr6w-23jq\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-43367\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-08-20T15:42:47.405347Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:boa:boa:*:*:*:*:*:*:*:*\"], \"vendor\": \"boa\", \"product\": \"boa\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"0.16\"}, {\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"0.19.0\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-20T15:45:18.006Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-43367\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2024-08-09T14:23:55.513Z\", \"datePublished\": \"2024-08-15T20:38:23.530Z\", \"dateUpdated\": \"2024-08-20T15:45:24.595Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2024-43367

Vulnerability from fkie_nvd - Published: 2024-08-15 21:15 - Updated: 2024-08-19 13:00

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7
	security-advisories@github.com	https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq
	security-advisories@github.com	https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Boa is an embeddable and experimental Javascript engine written in Rust. Starting in version 0.16 and prior to version 0.19.0, a wrong assumption made when handling ECMAScript\u0027s `AsyncGenerator` operations can cause an uncaught exception on certain scripts. Boa\u0027s implementation of `AsyncGenerator` makes the assumption that the state of an `AsyncGenerator` object cannot change while resolving a promise created by methods of `AsyncGenerator` such as `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, or `%AsyncGeneratorPrototype%.throw`. However, a carefully constructed code could trigger a state transition from a getter method for the promise\u0027s `then` property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user. Version 0.19.0 is patched to correctly handle this case. Users unable to upgrade to the patched version would want to use `std::panic::catch_unwind` to ensure any exceptions caused by the engine don\u0027t impact the availability of the main application."
    },
    {
      "lang": "es",
      "value": "Boa es un motor Javascript integrable y experimental escrito en Rust. A partir de la versi\u00f3n 0.16 y antes de la versi\u00f3n 0.19.0, una suposici\u00f3n incorrecta al manejar las operaciones `AsyncGenerator` de ECMAScript puede causar una excepci\u00f3n no detectada en ciertos scripts. La implementaci\u00f3n de Boa de `AsyncGenerator` supone que el estado de un objeto `AsyncGenerator` no puede cambiar mientras se resuelve una promesa creada por m\u00e9todos de `AsyncGenerator` como `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, o `%AsyncGeneratorPrototype%.throw`. Sin embargo, un c\u00f3digo cuidadosamente construido podr\u00eda desencadenar una transici\u00f3n de estado desde un m\u00e9todo getter para la propiedad \"then\" de la promesa, lo que hace que el motor falle en la afirmaci\u00f3n de esta suposici\u00f3n, provocando una excepci\u00f3n no detectada. Esto podr\u00eda usarse para crear un ataque de denegaci\u00f3n de servicio en aplicaciones que ejecutan c\u00f3digo ECMAScript arbitrario proporcionado por un usuario externo. La versi\u00f3n 0.19.0 tiene un parche para manejar correctamente este caso. Los usuarios que no puedan actualizar a la versi\u00f3n parcheada querr\u00e1n usar `std::panic::catch_unwind` para garantizar que las excepciones causadas por el motor no afecten la disponibilidad de la aplicaci\u00f3n principal."
    }
  ],
  "id": "CVE-2024-43367",
  "lastModified": "2024-08-19T13:00:23.117",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2024-08-15T21:15:17.777",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-F67Q-WR6W-23JQ

Vulnerability from github – Published: 2024-08-14 20:49 – Updated: 2025-12-20 05:28

Summary

Boa has an uncaught exception when transitioning the state of `AsyncGenerator` objects

Details

A wrong assumption made when handling ECMAScript's AsyncGenerator operations can cause an uncaught exception on certain scripts.

Details

Boa's implementation of AsyncGenerator makes the assumption that the state of an AsyncGenerator object cannot change while resolving a promise created by methods of AsyncGenerator such as %AsyncGeneratorPrototype%.next, %AsyncGeneratorPrototype%.return, or %AsyncGeneratorPrototype%.throw. However, a carefully constructed code could trigger a state transition from a getter method for the promise's then property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user.

Patches

Version 0.19.0 is patched to correctly handle this case.

Workarounds

Users unable to upgrade to the patched version would want to use std::panic::catch_unwind to ensure any exceptions caused by the engine don't impact the availability of the main application.

References

https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7
https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "boa_engine"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.16"
            },
            {
              "fixed": "0.19.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-43367"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-248"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-14T20:49:51Z",
    "nvd_published_at": "2024-08-15T21:15:17Z",
    "severity": "HIGH"
  },
  "details": "A wrong assumption made when handling ECMAScript\u0027s `AsyncGenerator` operations can cause an uncaught exception on certain scripts.\n\n## Details\n\nBoa\u0027s implementation of `AsyncGenerator` makes the assumption that the state of an `AsyncGenerator` object cannot change while resolving a promise created by methods of `AsyncGenerator` such as `%AsyncGeneratorPrototype%.next`, `%AsyncGeneratorPrototype%.return`, or `%AsyncGeneratorPrototype%.throw`.\nHowever, a carefully constructed code could trigger a state transition from a getter method for the promise\u0027s `then` property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user.\n\n## Patches\n\nVersion 0.19.0 is patched to correctly handle this case.\n\n## Workarounds\n\nUsers unable to upgrade to the patched version would want to use [`std::panic::catch_unwind`](https://doc.rust-lang.org/std/panic/fn.catch_unwind.html) to ensure any exceptions caused by the engine don\u0027t impact the availability of the main application.\n\n## References\n\n- https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7\n- https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r",
  "id": "GHSA-f67q-wr6w-23jq",
  "modified": "2025-12-20T05:28:05Z",
  "published": "2024-08-14T20:49:51Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tc39/ecma262/security/advisories/GHSA-g38c-wh3c-5h9r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43367"
    },
    {
      "type": "WEB",
      "url": "https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/boa-dev/boa"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0444.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Boa has an uncaught exception when transitioning the state of `AsyncGenerator` objects"
}

cve-2024-43367

Vulnerability from osv_rustsec

Published

2024-08-14 12:00

Modified

2025-12-19 06:15

Summary

Uncaught exception when transitioning the state of `AsyncGenerator` objects from within a property getter of `then`

Details

A wrong assumption made when handling ECMAScript's AsyncGenerator operations can cause an uncaught exception on certain scripts.

Details

Boa's implementation of AsyncGenerator makes the assumption that the state of an AsyncGenerator object cannot change while resolving a promise created by methods of AsyncGenerator such as %AsyncGeneratorPrototype%.next, %AsyncGeneratorPrototype%.return, or %AsyncGeneratorPrototype%.throw.

However, a carefully constructed code could trigger a state transition from a getter method for the promise's then property, which causes the engine to fail an assertion of this assumption, causing an uncaught exception. This could be used to create a Denial Of Service attack in applications that run arbitrary ECMAScript code provided by an external user.

Patches

Version 0.19.0 is patched to correctly handle this case.

Workarounds

Users unable to upgrade to the patched version would want to use std::panic::catch_unwind to ensure any exceptions caused by the engine don't impact the availability of the main application.

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [
          "denial-of-service"
        ],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "boa_engine",
        "purl": "pkg:cargo/boa_engine"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.16.0"
            },
            {
              "fixed": "0.19.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-f67q-wr6w-23jq",
    "CVE-2024-43367"
  ],
  "database_specific": {
    "license": "CC-BY-4.0"
  },
  "details": "A wrong assumption made when handling ECMAScript\u0027s AsyncGenerator operations\ncan cause an uncaught exception on certain scripts.\n\n## Details\n\nBoa\u0027s implementation of AsyncGenerator makes the assumption that the state of\nan AsyncGenerator object cannot change while resolving a promise created by\nmethods of AsyncGenerator such as %AsyncGeneratorPrototype%.next,\n%AsyncGeneratorPrototype%.return, or %AsyncGeneratorPrototype%.throw.\n\nHowever, a carefully constructed code could trigger a state transition from\na getter method for the promise\u0027s then property, which causes the engine to\nfail an assertion of this assumption, causing an uncaught exception. This\ncould be used to create a Denial Of Service attack in applications that\nrun arbitrary ECMAScript code provided by an external user.\n\n## Patches\n\nVersion 0.19.0 is patched to correctly handle this case.\n\n## Workarounds\n\nUsers unable to upgrade to the patched version would want to use\nstd::panic::catch_unwind to ensure any exceptions caused by the\nengine don\u0027t impact the availability of the main application.",
  "id": "RUSTSEC-2024-0444",
  "modified": "2025-12-19T06:15:15Z",
  "published": "2024-08-14T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/boa_engine"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2024-0444.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/boa-dev/boa/security/advisories/GHSA-f67q-wr6w-23jq"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43357"
    },
    {
      "type": "WEB",
      "url": "https://github.com/boa-dev/boa/commit/69ea2f52ed976934bff588d6b566bae01be313f7"
    }
  ],
  "related": [
    "CVE-2024-43357"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Uncaught exception when transitioning the state of `AsyncGenerator` objects from within a property getter of `then`"
}

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

CVE-2024-43367 (GCVE-0-2024-43367)

FKIE_CVE-2024-43367

GHSA-F67Q-WR6W-23JQ

Details

Patches

Workarounds

References

cve-2024-43367

Vulnerability from osv_rustsec

Details

Patches

Workarounds

Tags

Sightings

Nomenclature