fkie_cve-2021-47379
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-23 20:47
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: blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd KASAN reports a use-after-free report when doing fuzz test: [693354.104835] ================================================================== [693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160 [693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338 [693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147 [693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018 [693354.105612] Call Trace: [693354.105621] dump_stack+0xf1/0x19b [693354.105626] ? show_regs_print_info+0x5/0x5 [693354.105634] ? printk+0x9c/0xc3 [693354.105638] ? cpumask_weight+0x1f/0x1f [693354.105648] print_address_description+0x70/0x360 [693354.105654] kasan_report+0x1b2/0x330 [693354.105659] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105665] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105670] bfq_io_set_weight_legacy+0xd3/0x160 [693354.105675] ? bfq_cpd_init+0x20/0x20 [693354.105683] cgroup_file_write+0x3aa/0x510 [693354.105693] ? ___slab_alloc+0x507/0x540 [693354.105698] ? cgroup_file_poll+0x60/0x60 [693354.105702] ? 0xffffffff89600000 [693354.105708] ? usercopy_abort+0x90/0x90 [693354.105716] ? mutex_lock+0xef/0x180 [693354.105726] kernfs_fop_write+0x1ab/0x280 [693354.105732] ? cgroup_file_poll+0x60/0x60 [693354.105738] vfs_write+0xe7/0x230 [693354.105744] ksys_write+0xb0/0x140 [693354.105749] ? __ia32_sys_read+0x50/0x50 [693354.105760] do_syscall_64+0x112/0x370 [693354.105766] ? syscall_return_slowpath+0x260/0x260 [693354.105772] ? do_page_fault+0x9b/0x270 [693354.105779] ? prepare_exit_to_usermode+0xf9/0x1a0 [693354.105784] ? enter_from_user_mode+0x30/0x30 [693354.105793] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.105875] Allocated by task 1453337: [693354.106001] kasan_kmalloc+0xa0/0xd0 [693354.106006] kmem_cache_alloc_node_trace+0x108/0x220 [693354.106010] bfq_pd_alloc+0x96/0x120 [693354.106015] blkcg_activate_policy+0x1b7/0x2b0 [693354.106020] bfq_create_group_hierarchy+0x1e/0x80 [693354.106026] bfq_init_queue+0x678/0x8c0 [693354.106031] blk_mq_init_sched+0x1f8/0x460 [693354.106037] elevator_switch_mq+0xe1/0x240 [693354.106041] elevator_switch+0x25/0x40 [693354.106045] elv_iosched_store+0x1a1/0x230 [693354.106049] queue_attr_store+0x78/0xb0 [693354.106053] kernfs_fop_write+0x1ab/0x280 [693354.106056] vfs_write+0xe7/0x230 [693354.106060] ksys_write+0xb0/0x140 [693354.106064] do_syscall_64+0x112/0x370 [693354.106069] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106114] Freed by task 1453336: [693354.106225] __kasan_slab_free+0x130/0x180 [693354.106229] kfree+0x90/0x1b0 [693354.106233] blkcg_deactivate_policy+0x12c/0x220 [693354.106238] bfq_exit_queue+0xf5/0x110 [693354.106241] blk_mq_exit_sched+0x104/0x130 [693354.106245] __elevator_exit+0x45/0x60 [693354.106249] elevator_switch_mq+0xd6/0x240 [693354.106253] elevator_switch+0x25/0x40 [693354.106257] elv_iosched_store+0x1a1/0x230 [693354.106261] queue_attr_store+0x78/0xb0 [693354.106264] kernfs_fop_write+0x1ab/0x280 [693354.106268] vfs_write+0xe7/0x230 [693354.106271] ksys_write+0xb0/0x140 [693354.106275] do_syscall_64+0x112/0x370 [693354.106280] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106329] The buggy address belongs to the object at ffff888be0a35580 which belongs to the cache kmalloc-1k of size 1024 [693354.106736] The buggy address is located 228 bytes inside of 1024-byte region [ffff888be0a35580, ffff888be0a35980) [693354.107114] The buggy address belongs to the page: [693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0 [693354.107606] flags: 0x17ffffc0008100(slab|head) [693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080 [693354.108020] r ---truncated---
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdfPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdfPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.15


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F6EBA6BC-0594-4920-B410-5DDA60229E8E",
              "versionEndExcluding": "5.4.150",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A2A50090-4483-4F44-9147-BF0B012FBF7E",
              "versionEndExcluding": "5.10.70",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1B31D6C1-A751-438D-906B-0C56B789D498",
              "versionEndExcluding": "5.14.9",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd\n\nKASAN reports a use-after-free report when doing fuzz test:\n\n[693354.104835] ==================================================================\n[693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338\n\n[693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147\n[693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018\n[693354.105612] Call Trace:\n[693354.105621]  dump_stack+0xf1/0x19b\n[693354.105626]  ? show_regs_print_info+0x5/0x5\n[693354.105634]  ? printk+0x9c/0xc3\n[693354.105638]  ? cpumask_weight+0x1f/0x1f\n[693354.105648]  print_address_description+0x70/0x360\n[693354.105654]  kasan_report+0x1b2/0x330\n[693354.105659]  ? bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105665]  ? bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105670]  bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105675]  ? bfq_cpd_init+0x20/0x20\n[693354.105683]  cgroup_file_write+0x3aa/0x510\n[693354.105693]  ? ___slab_alloc+0x507/0x540\n[693354.105698]  ? cgroup_file_poll+0x60/0x60\n[693354.105702]  ? 0xffffffff89600000\n[693354.105708]  ? usercopy_abort+0x90/0x90\n[693354.105716]  ? mutex_lock+0xef/0x180\n[693354.105726]  kernfs_fop_write+0x1ab/0x280\n[693354.105732]  ? cgroup_file_poll+0x60/0x60\n[693354.105738]  vfs_write+0xe7/0x230\n[693354.105744]  ksys_write+0xb0/0x140\n[693354.105749]  ? __ia32_sys_read+0x50/0x50\n[693354.105760]  do_syscall_64+0x112/0x370\n[693354.105766]  ? syscall_return_slowpath+0x260/0x260\n[693354.105772]  ? do_page_fault+0x9b/0x270\n[693354.105779]  ? prepare_exit_to_usermode+0xf9/0x1a0\n[693354.105784]  ? enter_from_user_mode+0x30/0x30\n[693354.105793]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.105875] Allocated by task 1453337:\n[693354.106001]  kasan_kmalloc+0xa0/0xd0\n[693354.106006]  kmem_cache_alloc_node_trace+0x108/0x220\n[693354.106010]  bfq_pd_alloc+0x96/0x120\n[693354.106015]  blkcg_activate_policy+0x1b7/0x2b0\n[693354.106020]  bfq_create_group_hierarchy+0x1e/0x80\n[693354.106026]  bfq_init_queue+0x678/0x8c0\n[693354.106031]  blk_mq_init_sched+0x1f8/0x460\n[693354.106037]  elevator_switch_mq+0xe1/0x240\n[693354.106041]  elevator_switch+0x25/0x40\n[693354.106045]  elv_iosched_store+0x1a1/0x230\n[693354.106049]  queue_attr_store+0x78/0xb0\n[693354.106053]  kernfs_fop_write+0x1ab/0x280\n[693354.106056]  vfs_write+0xe7/0x230\n[693354.106060]  ksys_write+0xb0/0x140\n[693354.106064]  do_syscall_64+0x112/0x370\n[693354.106069]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.106114] Freed by task 1453336:\n[693354.106225]  __kasan_slab_free+0x130/0x180\n[693354.106229]  kfree+0x90/0x1b0\n[693354.106233]  blkcg_deactivate_policy+0x12c/0x220\n[693354.106238]  bfq_exit_queue+0xf5/0x110\n[693354.106241]  blk_mq_exit_sched+0x104/0x130\n[693354.106245]  __elevator_exit+0x45/0x60\n[693354.106249]  elevator_switch_mq+0xd6/0x240\n[693354.106253]  elevator_switch+0x25/0x40\n[693354.106257]  elv_iosched_store+0x1a1/0x230\n[693354.106261]  queue_attr_store+0x78/0xb0\n[693354.106264]  kernfs_fop_write+0x1ab/0x280\n[693354.106268]  vfs_write+0xe7/0x230\n[693354.106271]  ksys_write+0xb0/0x140\n[693354.106275]  do_syscall_64+0x112/0x370\n[693354.106280]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.106329] The buggy address belongs to the object at ffff888be0a35580\n                 which belongs to the cache kmalloc-1k of size 1024\n[693354.106736] The buggy address is located 228 bytes inside of\n                 1024-byte region [ffff888be0a35580, ffff888be0a35980)\n[693354.107114] The buggy address belongs to the page:\n[693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0\n[693354.107606] flags: 0x17ffffc0008100(slab|head)\n[693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080\n[693354.108020] r\n---truncated---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: blk-cgroup: corrige UAF capturando el bloqueo de blkcg antes de destruir blkg pd KASAN informa un informe de use after free al realizar una prueba fuzz: [693354.104835] ======= ==================================================== ========= [693354.105094] ERROR: KASAN: use after free en bfq_io_set_weight_legacy+0xd3/0x160 [693354.105336] Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff888be0a35664 por tarea sh/1453338 [693354.10560 7] CPU: 41 PID: 1453338 Comm: sh Kdump: cargado No contaminado 4.18.0-147 [693354.105610] Nombre de hardware: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 02/07/2018 [693354.105612] Seguimiento de llamadas: [693354.105621] +0xf1/0x19b [693354.105626] ? show_regs_print_info+0x5/0x5 [693354.105634] ? imprimirk+0x9c/0xc3 [693354.105638] ? cpumask_weight+0x1f/0x1f [693354.105648] print_address_description+0x70/0x360 [693354.105654] kasan_report+0x1b2/0x330 [693354.105659] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105665] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105670] bfq_io_set_weight_legacy+0xd3/0x160 [693354.105675] ? bfq_cpd_init+0x20/0x20 [693354.105683] cgroup_file_write+0x3aa/0x510 [693354.105693] ? ___slab_alloc+0x507/0x540 [693354.105698] ? cgroup_file_poll+0x60/0x60 [693354.105702] ? 0xffffffff89600000 [693354.105708] ? usercopy_abort+0x90/0x90 [693354.105716] ? mutex_lock+0xef/0x180 [693354.105726] kernfs_fop_write+0x1ab/0x280 [693354.105732] ? cgroup_file_poll+0x60/0x60 [693354.105738] vfs_write+0xe7/0x230 [693354.105744] ksys_write+0xb0/0x140 [693354.105749] ? __ia32_sys_read+0x50/0x50 [693354.105760] do_syscall_64+0x112/0x370 [693354.105766] ? syscall_return_slowpath+0x260/0x260 [693354.105772]? do_page_fault+0x9b/0x270 [693354.105779] ? prepare_exit_to_usermode+0xf9/0x1a0 [693354.105784] ? enter_from_user_mode+0x30/0x30 [693354.105793] Entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.105875] Asignado por la tarea 1453337: [693354.106001] kasan_kmalloc+0xa0/0xd0 [693354. 106006] kmem_cache_alloc_node_trace+0x108/0x220 [693354.106010] bfq_pd_alloc+0x96/0x120 [693354.106015] blkcg_activate_policy+ 0x1b7/0x2b0 [693354.106020] bfq_create_group_hierarchy+0x1e/0x80 [693354.106026] bfq_init_queue+0x678/0x8c0 [693354.106031] blk_mq_init_sched+0x1f8/0x460 [693354.106037] elevator_switch_mq+0xe1/0x240 [693354.106041] elevator_switch+0x25/0x40 [693354.106045] elv_iosched_store+0x1a1/ 0x230 [693354.106049] queue_attr_store+0x78/0xb0 [693354.106053] kernfs_fop_write+0x1ab/0x280 [693354.106056] vfs_write+0xe7/0x230 [693354.106060] s_write+0xb0/0x140 [693354.106064] do_syscall_64+0x112/0x370 [693354.106069] Entry_SYSCALL_64_after_hwframe+0x65/0xca [ 693354.106114] Liberado por la tarea 1453336: [693354.106225] __kasan_slab_free+0x130/0x180 [693354.106229] kfree+0x90/0x1b0 [693354.106233] blkcg_deactivate_policy+0x12 c/0x220 [693354.106238] bfq_exit_queue+0xf5/0x110 [693354.106241] blk_mq_exit_sched+0x104/0x130 [693354.106245] __elevator_exit+0x45/0x60 [693354.106249] elevator_switch_mq+0xd6/0x240 [693354.106253] interruptor_elevador+0x25/0x40 [693354.106257] elv_iosched_store+0x1a1/0x230 .106261] queue_attr_store+0x78/0xb0 [693354.106264] kernfs_fop_write+0x1ab/0x280 [693354.106268] vfs_write+ 0xe7/0x230 [693354.106271] ksys_write+0xb0/0x140 [693354.106275] do_syscall_64+0x112/0x370 [693354.106280] Entry_SYSCALL_64_after_hwframe+0x65/0xca [69335 4.106329] La direcci\u00f3n con errores pertenece al objeto en ffff888be0a35580 que pertenece al cach\u00e9 kmalloc-1k de tama\u00f1o 1024 [693354.106736] La direcci\u00f3n con errores se encuentra a 228 bytes dentro de la regi\u00f3n de 1024 bytes [ffff888be0a35580, ffff888be0a35980) [693354.107114] La direcci\u00f3n con errores pertenece a la p\u00e1gina: [693354.107273] p\u00e1gina:ffffea002f828c00 1 recuento de mapas: 0 mapeo: ffff888107c17080 \u00edndice: 0x0 Compound_mapcount: 0 [693354.107606] banderas: 0x17ffffc0008100(slab|head) [693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080 3354.108020] r ---truncado---"
    }
  ],
  "id": "CVE-2021-47379",
  "lastModified": "2024-12-23T20:47:30.867",
  "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": "2024-05-21T15:15:23.590",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fb"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.