fkie_cve-2022-48847
Vulnerability from fkie_nvd
Published
2024-07-16 13:15
Modified
2024-11-21 07:34
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: watch_queue: Fix filter limit check In watch_queue_set_filter(), there are a couple of places where we check that the filter type value does not exceed what the type_filter bitmap can hold. One place calculates the number of bits by: if (tf[i].type >= sizeof(wfilter->type_filter) * 8) which is fine, but the second does: if (tf[i].type >= sizeof(wfilter->type_filter) * BITS_PER_LONG) which is not. This can lead to a couple of out-of-bounds writes due to a too-large type: (1) __set_bit() on wfilter->type_filter (2) Writing more elements in wfilter->filters[] than we allocated. Fix this by just using the proper WATCH_TYPE__NR instead, which is the number of types we actually know about. The bug may cause an oops looking something like: BUG: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x659/0x740 Write of size 4 at addr ffff88800d2c66bc by task watch_queue_oob/611 ... Call Trace: <TASK> dump_stack_lvl+0x45/0x59 print_address_description.constprop.0+0x1f/0x150 ... kasan_report.cold+0x7f/0x11b ... watch_queue_set_filter+0x659/0x740 ... __x64_sys_ioctl+0x127/0x190 do_syscall_64+0x43/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae Allocated by task 611: kasan_save_stack+0x1e/0x40 __kasan_kmalloc+0x81/0xa0 watch_queue_set_filter+0x23a/0x740 __x64_sys_ioctl+0x127/0x190 do_syscall_64+0x43/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88800d2c66a0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 28 bytes inside of 32-byte region [ffff88800d2c66a0, ffff88800d2c66c0)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b09f28f70a5046acd64138075ae3f095238b045Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/648895da69ced90ca770fd941c3d9479a9d72c16Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b36588ebbcef74583824c08352e75838d6fb4ff2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c993ee0f9f81caf5767a50d1faeba39a0dc82af2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1b09f28f70a5046acd64138075ae3f095238b045Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/648895da69ced90ca770fd941c3d9479a9d72c16Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b36588ebbcef74583824c08352e75838d6fb4ff2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c993ee0f9f81caf5767a50d1faeba39a0dc82af2Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "FFACA37D-D2EA-44A7-8ED6-E58EE2222AFE",
              "versionEndExcluding": "5.10.106",
              "versionStartIncluding": "5.8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "5.15.29",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatch_queue: Fix filter limit check\n\nIn watch_queue_set_filter(), there are a couple of places where we check\nthat the filter type value does not exceed what the type_filter bitmap\ncan hold.  One place calculates the number of bits by:\n\n   if (tf[i].type \u003e= sizeof(wfilter-\u003etype_filter) * 8)\n\nwhich is fine, but the second does:\n\n   if (tf[i].type \u003e= sizeof(wfilter-\u003etype_filter) * BITS_PER_LONG)\n\nwhich is not.  This can lead to a couple of out-of-bounds writes due to\na too-large type:\n\n (1) __set_bit() on wfilter-\u003etype_filter\n (2) Writing more elements in wfilter-\u003efilters[] than we allocated.\n\nFix this by just using the proper WATCH_TYPE__NR instead, which is the\nnumber of types we actually know about.\n\nThe bug may cause an oops looking something like:\n\n  BUG: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x659/0x740\n  Write of size 4 at addr ffff88800d2c66bc by task watch_queue_oob/611\n  ...\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x45/0x59\n   print_address_description.constprop.0+0x1f/0x150\n   ...\n   kasan_report.cold+0x7f/0x11b\n   ...\n   watch_queue_set_filter+0x659/0x740\n   ...\n   __x64_sys_ioctl+0x127/0x190\n   do_syscall_64+0x43/0x90\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n  Allocated by task 611:\n   kasan_save_stack+0x1e/0x40\n   __kasan_kmalloc+0x81/0xa0\n   watch_queue_set_filter+0x23a/0x740\n   __x64_sys_ioctl+0x127/0x190\n   do_syscall_64+0x43/0x90\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n  The buggy address belongs to the object at ffff88800d2c66a0\n   which belongs to the cache kmalloc-32 of size 32\n  The buggy address is located 28 bytes inside of\n   32-byte region [ffff88800d2c66a0, ffff88800d2c66c0)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: watch_queue: corrige la verificaci\u00f3n del l\u00edmite del filtro En watch_queue_set_filter(), hay un par de lugares donde verificamos que el valor del tipo de filtro no exceda lo que puede contener el mapa de bits type_filter. Un lugar calcula el n\u00famero de bits mediante: if (tf[i].type \u0026gt;= sizeof(wfilter-\u0026gt;type_filter) * 8) lo cual est\u00e1 bien, pero el segundo s\u00ed: if (tf[i].type \u0026gt;= sizeof( wfilter-\u0026gt;type_filter) * BITS_PER_LONG) que no lo es. Esto puede provocar un par de escrituras fuera de los l\u00edmites debido a un tipo demasiado grande: (1) __set_bit() en wfilter-\u0026gt;type_filter (2) Escribir m\u00e1s elementos en wfilter-\u0026gt;filters[] de los que asignamos. Solucione este problema simplemente usando el WATCH_TYPE__NR adecuado, que es la cantidad de tipos que realmente conocemos. El error puede provocar un error parecido a: ERROR: KASAN: slab-out-of-bounds in watch_queue_set_filter+0x659/0x740 Escritura de tama\u00f1o 4 en la direcci\u00f3n ffff88800d2c66bc mediante la tarea watch_queue_oob/611... Seguimiento de llamadas:  dump_stack_lvl+ 0x45/0x59 print_address_description.constprop.0+0x1f/0x150 ... kasan_report.cold+0x7f/0x11b ... watch_queue_set_filter+0x659/0x740 ... __x64_sys_ioctl+0x127/0x190 do_syscall_64+0x43/0x90 entrada_ SYSCALL_64_after_hwframe+0x44/0xae Asignado por tarea 611: kasan_save_stack+0x1e/0x40 __kasan_kmalloc+0x81/0xa0 watch_queue_set_filter+0x23a/0x740 __x64_sys_ioctl+0x127/0x190 do_syscall_64+0x43/0x90 Entry_SYSCALL_64_after_hwframe+0x 44/0xae La direcci\u00f3n con errores pertenece al objeto en ffff88800d2c66a0 que pertenece al cach\u00e9 kmalloc-32 de tama\u00f1o 32 La direcci\u00f3n con errores se encuentra a 28 bytes dentro de la regi\u00f3n de 32 bytes [ffff88800d2c66a0, ffff88800d2c66c0)"
    }
  ],
  "id": "CVE-2022-48847",
  "lastModified": "2024-11-21T07:34:12.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-07-16T13:15:11.950",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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      "url": "https://git.kernel.org/stable/c/c993ee0f9f81caf5767a50d1faeba39a0dc82af2"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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