{
  "id": "CVE-2022-36086",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2022-09-07T23:15:14.097",
  "lastModified": "2023-07-21T19:23:18.197",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "linked_list_allocator is an allocator usable for no_std systems. Prior to version 0.10.2, the heap initialization methods were missing a minimum size check for the given heap size argument. This could lead to out-of-bound writes when a heap was initialized with a size smaller than `3 * size_of::<usize>` because of metadata write operations. This vulnerability impacts all the initialization functions on the `Heap` and `LockedHeap` types, including `Heap::new`, `Heap::init`, `Heap::init_from_slice`, and `LockedHeap::new`. It also affects multiple uses of the `Heap::extend` method. Version 0.10.2 contains a patch for the issue. As a workaround, ensure that the heap is only initialized with a size larger than `3 * size_of::<usize>` and that the `Heap::extend` method is only called with sizes larger than `2 * size_of::<usize>()`. Also, ensure that the total heap size is (and stays) a multiple of `2 * size_of::<usize>()`."
    },
    {
      "lang": "es",
      "value": "linked_list_allocator es un asignador usable en sistemas no_std. En versiones anteriores a 0.10.2, los m\u00e9todos de inicializaci\u00f3n de la pila carec\u00edan de una comprobaci\u00f3n del tama\u00f1o m\u00ednimo para el argumento del tama\u00f1o de la pila. Esto pod\u00eda conllevar a escrituras fuera de l\u00edmites cuando una pila es inicializada con un tama\u00f1o inferior a \"3 * size_of::(usize)\" debido a las operaciones de escritura de metadatos. Esta vulnerabilidad afecta a todas las funciones de inicializaci\u00f3n de los tipos \"Heap\" y \"LockedHeap\", incluyendo \"Heap::new\", \"Heap::init\", \"Heap::init_from_slice\", y \"LockedHeap::new\". Tambi\u00e9n afecta a m\u00faltiples usos del m\u00e9todo \"Heap::extend\". La versi\u00f3n 0.10.2 contiene un parche para este problema. Como mitigaci\u00f3n, aseg\u00farese de que la pila s\u00f3lo es inicializada con un tama\u00f1o superior a \"3 * size_of::(usize)\" y que el m\u00e9todo \"Heap::extend\" s\u00f3lo es llamado con tama\u00f1os superiores a \"2 * size_of::(usize)()\". Adem\u00e1s, aseg\u00farese de que el tama\u00f1o total de la pila es (y es mantenido) un m\u00faltiplo de \"2 * size_of::(usize)()\""
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9
      },
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1284"
        }
      ]
    },
    {
      "source": "security-advisories@github.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:rust-osdev:linked-list-allocator:*:*:*:*:*:rust:*:*",
              "versionEndExcluding": "0.10.2",
              "matchCriteriaId": "D1EB783F-18F3-471C-8006-9949D06163C3"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/rust-osdev/linked-list-allocator/commit/013b0758643943e8df5b17bbb495460ff47e8bbf",
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/rust-osdev/linked-list-allocator/security/advisories/GHSA-xg8p-34w2-j49j",
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Third Party Advisory"
      ]
    }
  ]
}