CVE-2021-47219
Vulnerability from cvelistv5
Published
2024-04-10 19:01
Modified
2024-11-04 12:01
Severity ?
EPSS score ?
Summary
scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()
References
Impacted products
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"timestamp": "2024-04-10T19:49:13.779675Z",
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"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/scsi/scsi_debug.c"
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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"version": "5.16",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()\n\nThe following issue was observed running syzkaller:\n\nBUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline]\nBUG: KASAN: slab-out-of-bounds in sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\nRead of size 2132 at addr ffff8880aea95dc8 by task syz-executor.0/9815\n\nCPU: 0 PID: 9815 Comm: syz-executor.0 Not tainted 4.19.202-00874-gfc0fe04215a9 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014\nCall Trace:\n __dump_stack lib/dump_stack.c:77 [inline]\n dump_stack+0xe4/0x14a lib/dump_stack.c:118\n print_address_description+0x73/0x280 mm/kasan/report.c:253\n kasan_report_error mm/kasan/report.c:352 [inline]\n kasan_report+0x272/0x370 mm/kasan/report.c:410\n memcpy+0x1f/0x50 mm/kasan/kasan.c:302\n memcpy include/linux/string.h:377 [inline]\n sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\n fill_from_dev_buffer+0x14f/0x340 drivers/scsi/scsi_debug.c:1021\n resp_report_tgtpgs+0x5aa/0x770 drivers/scsi/scsi_debug.c:1772\n schedule_resp+0x464/0x12f0 drivers/scsi/scsi_debug.c:4429\n scsi_debug_queuecommand+0x467/0x1390 drivers/scsi/scsi_debug.c:5835\n scsi_dispatch_cmd+0x3fc/0x9b0 drivers/scsi/scsi_lib.c:1896\n scsi_request_fn+0x1042/0x1810 drivers/scsi/scsi_lib.c:2034\n __blk_run_queue_uncond block/blk-core.c:464 [inline]\n __blk_run_queue+0x1a4/0x380 block/blk-core.c:484\n blk_execute_rq_nowait+0x1c2/0x2d0 block/blk-exec.c:78\n sg_common_write.isra.19+0xd74/0x1dc0 drivers/scsi/sg.c:847\n sg_write.part.23+0x6e0/0xd00 drivers/scsi/sg.c:716\n sg_write+0x64/0xa0 drivers/scsi/sg.c:622\n __vfs_write+0xed/0x690 fs/read_write.c:485\nkill_bdev:block_device:00000000e138492c\n vfs_write+0x184/0x4c0 fs/read_write.c:549\n ksys_write+0x107/0x240 fs/read_write.c:599\n do_syscall_64+0xc2/0x560 arch/x86/entry/common.c:293\n entry_SYSCALL_64_after_hwframe+0x49/0xbe\n\nWe get \u0027alen\u0027 from command its type is int. If userspace passes a large\nlength we will get a negative \u0027alen\u0027.\n\nSwitch n, alen, and rlen to u32."
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"dateUpdated": "2024-11-04T12:01:44.089Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"url": "https://git.kernel.org/stable/c/8440377e1a5644779b4c8d013aa2a917f5fc83c3"
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"url": "https://git.kernel.org/stable/c/f347c26836c270199de1599c3cd466bb7747caa9"
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"title": "scsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()",
"x_generator": {
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"assignerShortName": "Linux",
"cveId": "CVE-2021-47219",
"datePublished": "2024-04-10T19:01:57.694Z",
"dateReserved": "2024-04-10T18:59:19.528Z",
"dateUpdated": "2024-11-04T12:01:44.089Z",
"state": "PUBLISHED"
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"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2021-47219\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-10T19:15:48.903\",\"lastModified\":\"2024-11-21T06:35:39.137\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: scsi_debug: Fix out-of-bound read in resp_report_tgtpgs()\\n\\nThe following issue was observed running syzkaller:\\n\\nBUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:377 [inline]\\nBUG: KASAN: slab-out-of-bounds in sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\\nRead of size 2132 at addr ffff8880aea95dc8 by task syz-executor.0/9815\\n\\nCPU: 0 PID: 9815 Comm: syz-executor.0 Not tainted 4.19.202-00874-gfc0fe04215a9 #2\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014\\nCall Trace:\\n __dump_stack lib/dump_stack.c:77 [inline]\\n dump_stack+0xe4/0x14a lib/dump_stack.c:118\\n print_address_description+0x73/0x280 mm/kasan/report.c:253\\n kasan_report_error mm/kasan/report.c:352 [inline]\\n kasan_report+0x272/0x370 mm/kasan/report.c:410\\n memcpy+0x1f/0x50 mm/kasan/kasan.c:302\\n memcpy include/linux/string.h:377 [inline]\\n sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831\\n fill_from_dev_buffer+0x14f/0x340 drivers/scsi/scsi_debug.c:1021\\n resp_report_tgtpgs+0x5aa/0x770 drivers/scsi/scsi_debug.c:1772\\n schedule_resp+0x464/0x12f0 drivers/scsi/scsi_debug.c:4429\\n scsi_debug_queuecommand+0x467/0x1390 drivers/scsi/scsi_debug.c:5835\\n scsi_dispatch_cmd+0x3fc/0x9b0 drivers/scsi/scsi_lib.c:1896\\n scsi_request_fn+0x1042/0x1810 drivers/scsi/scsi_lib.c:2034\\n __blk_run_queue_uncond block/blk-core.c:464 [inline]\\n __blk_run_queue+0x1a4/0x380 block/blk-core.c:484\\n blk_execute_rq_nowait+0x1c2/0x2d0 block/blk-exec.c:78\\n sg_common_write.isra.19+0xd74/0x1dc0 drivers/scsi/sg.c:847\\n sg_write.part.23+0x6e0/0xd00 drivers/scsi/sg.c:716\\n sg_write+0x64/0xa0 drivers/scsi/sg.c:622\\n __vfs_write+0xed/0x690 fs/read_write.c:485\\nkill_bdev:block_device:00000000e138492c\\n vfs_write+0x184/0x4c0 fs/read_write.c:549\\n ksys_write+0x107/0x240 fs/read_write.c:599\\n do_syscall_64+0xc2/0x560 arch/x86/entry/common.c:293\\n entry_SYSCALL_64_after_hwframe+0x49/0xbe\\n\\nWe get \u0027alen\u0027 from command its type is int. If userspace passes a large\\nlength we will get a negative \u0027alen\u0027.\\n\\nSwitch n, alen, and rlen to u32.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: scsi_debug: Corregir lectura fuera de los l\u00edmites en resp_report_tgtpgs() Se observ\u00f3 el siguiente problema al ejecutar syzkaller: ERROR: KASAN: slab-out-of-bounds en memcpy include/linux/string.h:377 [en l\u00ednea] ERROR: KASAN: slab-out-of-bounds en sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831 Lectura de tama\u00f1o 2132 en la direcci\u00f3n ffff8880aea95dc8 por la tarea syz-executor.0/9815 CPU: 0 PID: 9815 Comm: syz-executor.0 No contaminado 4.19.202-00874-gfc0fe04215a9 #2 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 01/04/2014 Seguimiento de llamadas: __dump_stack lib/dump_stack.c:77 [en l\u00ednea] dump_stack+0xe4/0x14a lib/dump_stack.c:118 print_address_description+0x73/0x280 mm/kasan/report.c:253 kasan_report_error mm/kasan/report.c:352 [en l\u00ednea] kasan_report+0x272/0x370 mm/kasan/report.c:410 memcpy+0x1f/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:377 [en l\u00ednea] sg_copy_buffer+0x150/0x1c0 lib/scatterlist.c:831 rellenar_desde_buffer_dev+0x14f/0x340 drivers/scsi/scsi_debug.c:1021 resp_report_tgtpgs+0x5aa/0x770 drivers/scsi/scsi_debug.c:1772 schedule_resp+0x464/0x12f0 drivers/scsi/scsi_debug.c:4429 scsi_debug_queuecommand+0x467/0x1390 drivers/scsi/scsi_debug.c:5835 scsi_dispatch_cmd+0x3fc/0x9b0 drivers/scsi/scsi_lib.c:1896 scsi_request_fn+0x1042/0x1810 drivers/scsi/scsi_lib.c:2034 __blk_run_queue_uncond bloque/blk-core.c:464 [en l\u00ednea] __blk_run_queue+0x1a4/0x380 bloque/blk-core.c:484 blk_execute_rq_nowait+0x1c2/0x2d0 bloque/blk-exec.c:78 sg_common_write.isra.19+0xd74/0x1dc0 drivers/scsi/sg.c:847 sg_write.part.23+0x6e0/0xd00 drivers/scsi/sg.c:716 sg_write+0x64/0xa0 drivers/scsi/sg.c:622 __vfs_write+0xed/0x690 fs/read_write.c:485 kill_bdev:block_device:00000000e138492c vfs_write+0x184/0x4c0 fs/read_write.c:549 ksys_write+0x107/0x240 fs/read_write.c:599 do_syscall_64+0xc2/0x560 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Obtenemos \u0027alen\u0027 del comando, su tipo es int. Si el espacio de usuario pasa una longitud grande, obtendremos un \u0027alen\u0027 negativo. Cambie n, alen y rlen a u32.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/66523553fa62c7878fc5441dc4e82be71934eb77\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8440377e1a5644779b4c8d013aa2a917f5fc83c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f347c26836c270199de1599c3cd466bb7747caa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/66523553fa62c7878fc5441dc4e82be71934eb77\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/8440377e1a5644779b4c8d013aa2a917f5fc83c3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/f347c26836c270199de1599c3cd466bb7747caa9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
}
}
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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.