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nvd-json-data-feeds/CVE-2021/CVE-2021-471xx/CVE-2021-47145.json
cad-safe-bot 8d61dbe5b7 Auto-Update: 2024-12-20T15:00:35.115913+00:00
2024-12-20 15:03:58 +00:00

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{
"id": "CVE-2021-47145",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2024-03-25T09:15:08.993",
"lastModified": "2024-12-20T13:54:08.207",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON in link_to_fixup_dir\n\nWhile doing error injection testing I got the following panic\n\n kernel BUG at fs/btrfs/tree-log.c:1862!\n invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014\n RIP: 0010:link_to_fixup_dir+0xd5/0xe0\n RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216\n RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0\n RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000\n RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001\n R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800\n R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065\n FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0\n Call Trace:\n replay_one_buffer+0x409/0x470\n ? btree_read_extent_buffer_pages+0xd0/0x110\n walk_up_log_tree+0x157/0x1e0\n walk_log_tree+0xa6/0x1d0\n btrfs_recover_log_trees+0x1da/0x360\n ? replay_one_extent+0x7b0/0x7b0\n open_ctree+0x1486/0x1720\n btrfs_mount_root.cold+0x12/0xea\n ? __kmalloc_track_caller+0x12f/0x240\n legacy_get_tree+0x24/0x40\n vfs_get_tree+0x22/0xb0\n vfs_kern_mount.part.0+0x71/0xb0\n btrfs_mount+0x10d/0x380\n ? vfs_parse_fs_string+0x4d/0x90\n legacy_get_tree+0x24/0x40\n vfs_get_tree+0x22/0xb0\n path_mount+0x433/0xa10\n __x64_sys_mount+0xe3/0x120\n do_syscall_64+0x3d/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nWe can get -EIO or any number of legitimate errors from\nbtrfs_search_slot(), panicing here is not the appropriate response. The\nerror path for this code handles errors properly, simply return the\nerror."
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: btrfs: no haga ERROR_ON en link_to_fixup_dir Mientras realizaba pruebas de inyecci\u00f3n de errores, obtuve el siguiente ERROR de p\u00e1nico en el kernel en fs/btrfs/tree-log.c:1862. c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] SMP NOPTI CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305 Nombre de hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 01/04/2014 RIP: 0010:link_to_fixup_dir+0xd5/0xe0 RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216 RAX: fffffffffffffffb RBX: 00000000ffffffffb RCX: ffff8f595287faf0 RDX : ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000 RBP: ffff8f5953af9450 R08: 00000000000000019 R09: 0000000000000001 R10 : 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800 R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065 FS: 00007 fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5287f47c0 CR3: 0 00000011275e002 CR4: 0000000000370ee0 Seguimiento de llamadas: replay_one_buffer+0x409/0x470? btree_read_extent_buffer_pages+0xd0/0x110 walk_up_log_tree+0x157/0x1e0 walk_log_tree+0xa6/0x1d0 btrfs_recover_log_trees+0x1da/0x360 ? replay_one_extent+0x7b0/0x7b0 open_ctree+0x1486/0x1720 btrfs_mount_root.cold+0x12/0xea ? __kmalloc_track_caller+0x12f/0x240 Legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 vfs_kern_mount.part.0+0x71/0xb0 btrfs_mount+0x10d/0x380 ? vfs_parse_fs_string+0x4d/0x90 Legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 path_mount+0x433/0xa10 __x64_sys_mount+0xe3/0x120 do_syscall_64+0x3d/0x80 Entry_SYSCALL_64_after_hwframe+0 x44/0xae Podemos obtener -EIO o cualquier n\u00famero de errores leg\u00edtimos de btrfs_search_slot() , entrar en p\u00e1nico aqu\u00ed no es la respuesta adecuada. La ruta de error para este c\u00f3digo maneja los errores correctamente, simplemente devuelve el error."
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "nvd@nist.gov",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
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