{ "dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": { "cveId": "CVE-2021-47191", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-25T09:12:14.113Z", "datePublished": "2024-04-10T18:56:29.455Z", "dateUpdated": "2024-08-04T05:32:07.284Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-05-29T05:03:38.345Z" }, "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_readcap16()\n\nThe following warning was observed running syzkaller:\n\n[ 3813.830724] sg_write: data in/out 65466/242 bytes for SCSI command 0x9e-- guessing data in;\n[ 3813.830724] program syz-executor not setting count and/or reply_len properly\n[ 3813.836956] ==================================================================\n[ 3813.839465] BUG: KASAN: stack-out-of-bounds in sg_copy_buffer+0x157/0x1e0\n[ 3813.841773] Read of size 4096 at addr ffff8883cf80f540 by task syz-executor/1549\n[ 3813.846612] Call Trace:\n[ 3813.846995] dump_stack+0x108/0x15f\n[ 3813.847524] print_address_description+0xa5/0x372\n[ 3813.848243] kasan_report.cold+0x236/0x2a8\n[ 3813.849439] check_memory_region+0x240/0x270\n[ 3813.850094] memcpy+0x30/0x80\n[ 3813.850553] sg_copy_buffer+0x157/0x1e0\n[ 3813.853032] sg_copy_from_buffer+0x13/0x20\n[ 3813.853660] fill_from_dev_buffer+0x135/0x370\n[ 3813.854329] resp_readcap16+0x1ac/0x280\n[ 3813.856917] schedule_resp+0x41f/0x1630\n[ 3813.858203] scsi_debug_queuecommand+0xb32/0x17e0\n[ 3813.862699] scsi_dispatch_cmd+0x330/0x950\n[ 3813.863329] scsi_request_fn+0xd8e/0x1710\n[ 3813.863946] __blk_run_queue+0x10b/0x230\n[ 3813.864544] blk_execute_rq_nowait+0x1d8/0x400\n[ 3813.865220] sg_common_write.isra.0+0xe61/0x2420\n[ 3813.871637] sg_write+0x6c8/0xef0\n[ 3813.878853] __vfs_write+0xe4/0x800\n[ 3813.883487] vfs_write+0x17b/0x530\n[ 3813.884008] ksys_write+0x103/0x270\n[ 3813.886268] __x64_sys_write+0x77/0xc0\n[ 3813.886841] do_syscall_64+0x106/0x360\n[ 3813.887415] entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\nThis issue can be reproduced with the following syzkaller log:\n\nr0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./file0\\x00', 0x26e1, 0x0)\nr1 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='fd/3\\x00')\nopen_by_handle_at(r1, &(0x7f00000003c0)=ANY=[@ANYRESHEX], 0x602000)\nr2 = syz_open_dev$sg(&(0x7f0000000000), 0x0, 0x40782)\nwrite$binfmt_aout(r2, &(0x7f0000000340)=ANY=[@ANYBLOB=\"00000000deff000000000000000000000000000000000000000000000000000047f007af9e107a41ec395f1bded7be24277a1501ff6196a83366f4e6362bc0ff2b247f68a972989b094b2da4fb3607fcf611a22dd04310d28c75039d\"], 0x126)\n\nIn resp_readcap16() we get \"int alloc_len\" value -1104926854, and then pass\nthe huge arr_len to fill_from_dev_buffer(), but arr is only 32 bytes. This\nleads to OOB in sg_copy_buffer().\n\nTo solve this issue, define alloc_len as u32." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/scsi_debug.c" ], "versions": [ { "version": "1da177e4c3f4", "lessThan": "3e20cb072679", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "5b8bed6464ad", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f4", "lessThan": "4e3ace0051e7", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/scsi_debug.c" ], "versions": [ { "version": "5.10.82", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.5", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3e20cb072679bdb47747ccc8bee3233a4cf0765a" }, { "url": "https://git.kernel.org/stable/c/5b8bed6464ad6653586e30df046185fd816ad999" }, { "url": "https://git.kernel.org/stable/c/4e3ace0051e7e504b55d239daab8789dd89b863c" } ], "title": "scsi: scsi_debug: Fix out-of-bound read in resp_readcap16()", "x_generator": { "engine": "bippy-a5840b7849dd" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-17T18:03:54.717932Z", "id": "CVE-2021-47191", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-17T18:04:58.134Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:32:07.284Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/3e20cb072679bdb47747ccc8bee3233a4cf0765a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5b8bed6464ad6653586e30df046185fd816ad999", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/4e3ace0051e7e504b55d239daab8789dd89b863c", "tags": [ "x_transferred" ] } ] } ] } }