gsd-2021-46951
Vulnerability from gsd
Modified
2024-02-26 06:03
Details
In the Linux kernel, the following vulnerability has been resolved:
tpm: efi: Use local variable for calculating final log size
When tpm_read_log_efi is called multiple times, which happens when
one loads and unloads a TPM2 driver multiple times, then the global
variable efi_tpm_final_log_size will at some point become a negative
number due to the subtraction of final_events_preboot_size occurring
each time. Use a local variable to avoid this integer underflow.
The following issue is now resolved:
Mar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
Mar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy]
Mar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20
Mar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 <f3> 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4
Mar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206
Mar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f
Mar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d
Mar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073
Mar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5
Mar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018
Mar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000
Mar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0
Mar 8 15:35:12 hibinst kernel: Call Trace:
Mar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7
Mar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0
Mar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260
Mar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy]
Mar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370
Mar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0
Mar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2021-46951"
],
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: efi: Use local variable for calculating final log size\n\nWhen tpm_read_log_efi is called multiple times, which happens when\none loads and unloads a TPM2 driver multiple times, then the global\nvariable efi_tpm_final_log_size will at some point become a negative\nnumber due to the subtraction of final_events_preboot_size occurring\neach time. Use a local variable to avoid this integer underflow.\n\nThe following issue is now resolved:\n\nMar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\nMar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20\nMar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 \u003cf3\u003e 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4\nMar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206\nMar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f\nMar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d\nMar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073\nMar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5\nMar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018\nMar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000\nMar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nMar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0\nMar 8 15:35:12 hibinst kernel: Call Trace:\nMar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7\nMar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0\nMar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260\nMar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370\nMar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0\nMar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370",
"id": "GSD-2021-46951",
"modified": "2024-02-26T06:03:52.823943Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
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"CVE_data_meta": {
"ASSIGNER": "cve@kernel.org",
"ID": "CVE-2021-46951",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "166a2809d65b",
"version_value": "2f12258b5224"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"lessThan": "5.3",
"status": "unaffected",
"version": "0",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.118",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.36",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.11.*",
"status": "unaffected",
"version": "5.11.20",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.12.*",
"status": "unaffected",
"version": "5.12.3",
"versionType": "custom"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.13",
"versionType": "original_commit_for_fix"
}
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}
]
}
}
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},
"vendor_name": "Linux"
}
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}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: efi: Use local variable for calculating final log size\n\nWhen tpm_read_log_efi is called multiple times, which happens when\none loads and unloads a TPM2 driver multiple times, then the global\nvariable efi_tpm_final_log_size will at some point become a negative\nnumber due to the subtraction of final_events_preboot_size occurring\neach time. Use a local variable to avoid this integer underflow.\n\nThe following issue is now resolved:\n\nMar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\nMar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20\nMar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 \u003cf3\u003e 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4\nMar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206\nMar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f\nMar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d\nMar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073\nMar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5\nMar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018\nMar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000\nMar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nMar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0\nMar 8 15:35:12 hibinst kernel: Call Trace:\nMar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7\nMar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0\nMar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260\nMar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370\nMar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0\nMar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370"
}
]
},
"generator": {
"engine": "bippy-b01c2a820106"
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://git.kernel.org/stable/c/2f12258b5224cfaa808c54fd29345f3c1cbfca76",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/2f12258b5224cfaa808c54fd29345f3c1cbfca76"
},
{
"name": "https://git.kernel.org/stable/c/60a01ecc9f68067e4314a0b55148e39e5d58a51b",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/60a01ecc9f68067e4314a0b55148e39e5d58a51b"
},
{
"name": "https://git.kernel.org/stable/c/3818b753277f5ca0c170bf5b98e0a5a225542fcb",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/3818b753277f5ca0c170bf5b98e0a5a225542fcb"
},
{
"name": "https://git.kernel.org/stable/c/ac07c557ca12ec9276c0375517bac7ae5be4e50c",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/ac07c557ca12ec9276c0375517bac7ae5be4e50c"
},
{
"name": "https://git.kernel.org/stable/c/48cff270b037022e37835d93361646205ca25101",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/48cff270b037022e37835d93361646205ca25101"
}
]
}
},
"nvd.nist.gov": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E2F9A2C0-AF4B-4AEB-8B7D-1654AAE2376E",
"versionEndExcluding": "5.4.118",
"versionStartIncluding": "5.3.0",
"vulnerable": true
},
{
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"matchCriteriaId": "C7148769-B830-4B8F-986F-E0C85A19FC7F",
"versionEndExcluding": "5.10.36",
"versionStartIncluding": "5.5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "EFB425F0-C28C-4B44-8B4C-AD512AA832DE",
"versionEndExcluding": "5.11.20",
"versionStartIncluding": "5.11.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C3814FA3-8141-4313-A852-8C4212BE12AD",
"versionEndExcluding": "5.12.3",
"versionStartIncluding": "5.12.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: efi: Use local variable for calculating final log size\n\nWhen tpm_read_log_efi is called multiple times, which happens when\none loads and unloads a TPM2 driver multiple times, then the global\nvariable efi_tpm_final_log_size will at some point become a negative\nnumber due to the subtraction of final_events_preboot_size occurring\neach time. Use a local variable to avoid this integer underflow.\n\nThe following issue is now resolved:\n\nMar 8 15:35:12 hibinst kernel: Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\nMar 8 15:35:12 hibinst kernel: Workqueue: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: RIP: 0010:__memcpy+0x12/0x20\nMar 8 15:35:12 hibinst kernel: Code: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 \u003cf3\u003e 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4\nMar 8 15:35:12 hibinst kernel: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206\nMar 8 15:35:12 hibinst kernel: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ffffffffffffe0f\nMar 8 15:35:12 hibinst kernel: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d\nMar 8 15:35:12 hibinst kernel: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000000007e9d6073\nMar 8 15:35:12 hibinst kernel: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5\nMar 8 15:35:12 hibinst kernel: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018\nMar 8 15:35:12 hibinst kernel: FS: 0000000000000000(0000) GS:ffff88f87bd00000(0000) knlGS:0000000000000000\nMar 8 15:35:12 hibinst kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nMar 8 15:35:12 hibinst kernel: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0\nMar 8 15:35:12 hibinst kernel: Call Trace:\nMar 8 15:35:12 hibinst kernel: tpm_read_log_efi+0x152/0x1a7\nMar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0\nMar 8 15:35:12 hibinst kernel: tpm_chip_register+0x8f/0x260\nMar 8 15:35:12 hibinst kernel: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy]\nMar 8 15:35:12 hibinst kernel: process_one_work+0x1b4/0x370\nMar 8 15:35:12 hibinst kernel: worker_thread+0x53/0x3e0\nMar 8 15:35:12 hibinst kernel: ? process_one_work+0x370/0x370"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tpm: efi: use la variable local para calcular el tama\u00f1o del registro final Cuando se llama a tpm_read_log_efi varias veces, lo que sucede cuando uno carga y descarga un controlador TPM2 varias veces, entonces la variable global efi_tpm_final_log_size en alg\u00fan momento se convierte en un n\u00famero negativo debido a la resta de final_events_preboot_size que ocurre cada vez. Utilice una variable local para evitar este desbordamiento de enteros. El siguiente problema ahora est\u00e1 resuelto: 8 de marzo 15:35:12 kernel hibinst: Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 0.0.0 06/02/2015 8 de marzo 15:35:12 kernel hibinst: Cola de trabajo: tpm-vtpm vtpm_proxy_work [tpm_vtpm_proxy] 8 de marzo 15:35:12 kernel de hibinst: RIP: 0010:__memcpy+0x12/0x20 8 de marzo 15:35:12 kernel de hibinst: C\u00f3digo: 00 b8 01 00 00 00 85 d2 74 0a c7 05 44 7b ef 00 0f 00 00 00 c3 cc cc cc 66 66 90 66 90 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 f3 a4 8 de marzo 15:35:12 kernel de hibinst: RSP: 0018:ffff9ac4c0fcfde0 EFLAGS: 00010206 8 de marzo 15:35:12 kernel de hibinst: RAX: ffff88f878cefed5 RBX: ffff88f878ce9000 RCX: 1ff ffffffffffe0f 8 de marzo 15:35:12 kernel de hibinst: RDX: 0000000000000003 RSI: ffff9ac4c003bff9 RDI: ffff88f878cf0e4d 8 de marzo 15:35:12 kernel de hibinst: RBP: ffff9ac4c003b000 R08: 0000000000001000 R09: 000 000007e9d6073 8 de marzo 15:35:12 kernel hibinst: R10: ffff9ac4c003b000 R11: ffff88f879ad3500 R12: 0000000000000ed5 8 de marzo 15:35:12 kernel de hibinst: R13: ffff88f878ce9760 R14: 0000000000000002 R15: ffff88f77de7f018 8 de marzo 15:35:12 kernel de hibinst: FS: 0000000000000000(0000) GS:ffff8 8f87bd00000(0000) knlGS:0000000000000000 8 de marzo a las 15:35: 12 kernel de hibinst: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 8 de marzo 15:35:12 kernel de hibinst: CR2: ffff9ac4c003c000 CR3: 00000001785a6004 CR4: 0000000000060ee0 8 de marzo 15:35:12 kernel de hibinst: Seguimiento de llamadas: 8 de marzo 15:35:12 Hibinst Kernel: tpm_read_log_efi+0x152/0x1a7 mar 8 15:35:12 hibinst kernel: tpm_bios_log_setup+0xc8/0x1c0 mar 8 15:35:12 hibinst kernel: tpm_chip_register kernel de hibinst: vtpm_proxy_work+0x16/0x60 [tpm_vtpm_proxy] 8 de marzo 15:35:12 kernel de hibinst: Process_one_work+0x1b4/0x370 8 de marzo 15:35:12 kernel de hibinst: work_thread+0x53/0x3e0 8 de marzo 15:35:12 kernel de hibinst : ? proceso_un_trabajo+0x370/0x370"
}
],
"id": "CVE-2021-46951",
"lastModified": "2024-04-10T20:15:55.593",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-02-27T19:04:06.470",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/2f12258b5224cfaa808c54fd29345f3c1cbfca76"
},
{
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"url": "https://git.kernel.org/stable/c/3818b753277f5ca0c170bf5b98e0a5a225542fcb"
},
{
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"tags": [
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"url": "https://git.kernel.org/stable/c/48cff270b037022e37835d93361646205ca25101"
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"tags": [
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"tags": [
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"url": "https://git.kernel.org/stable/c/ac07c557ca12ec9276c0375517bac7ae5be4e50c"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-191"
}
],
"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.
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