CVE-2021-47035 - OpenCVE

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Remove WO permissions on second-level paging entries When the first level page table is used for IOVA translation, it only supports Read-Only and Read-Write permissions. The Write-Only permission is not supported as the PRESENT bit (implying Read permission) should always set. When using second level, we still give separate permissions that allows WriteOnly which seems inconsistent and awkward. We want to have consistent behavior. After moving to 1st level, we don't want things to work sometimes, and break if we use 2nd level for the same mappings. Hence remove this configuration.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

References

Link	Providers
https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0
https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20
https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2
https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3
https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c
https://lore.kernel.org/linux-cve-announce/2024022836-CVE-2021-47035-e152@gregkh/T/#u
https://nvd.nist.gov/vuln/detail/CVE-2021-47035
https://www.cve.org/CVERecord?id=CVE-2021-47035

History

Mon, 04 Nov 2024 13:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-02-28T08:13:43.404Z

Updated: 2024-11-04T11:58:09.516Z

Reserved: 2024-02-27T18:42:55.964Z

Link: CVE-2021-47035

Vulnrichment

Updated: 2024-08-04T05:24:39.557Z

NVD

Status : Awaiting Analysis

Published: 2024-02-28T09:15:39.757

Modified: 2024-02-28T14:06:45.783

Link: CVE-2021-47035

Redhat

Severity : Low

Publid Date: 2024-02-28T00:00:00Z

Links: CVE-2021-47035 - Bugzilla

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-47035", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.964Z", "datePublished": "2024-02-28T08:13:43.404Z", "dateUpdated": "2024-11-04T11:58:09.516Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:58:09.516Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Remove WO permissions on second-level paging entries\n\nWhen the first level page table is used for IOVA translation, it only\nsupports Read-Only and Read-Write permissions. The Write-Only permission\nis not supported as the PRESENT bit (implying Read permission) should\nalways set. When using second level, we still give separate permissions\nthat allows WriteOnly which seems inconsistent and awkward. We want to\nhave consistent behavior. After moving to 1st level, we don't want things\nto work sometimes, and break if we use 2nd level for the same mappings.\nHence remove this configuration."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/intel/iommu.c"], "versions": [{"version": "b802d070a52a", "lessThan": "c848416cc05a", "status": "affected", "versionType": "git"}, {"version": "b802d070a52a", "lessThan": "89bd62079870", "status": "affected", "versionType": "git"}, {"version": "b802d070a52a", "lessThan": "25faff781389", "status": "affected", "versionType": "git"}, {"version": "b802d070a52a", "lessThan": "66c24699f266", "status": "affected", "versionType": "git"}, {"version": "b802d070a52a", "lessThan": "eea53c581688", "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/iommu/intel/iommu.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.38", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3"}, {"url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2"}, {"url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0"}, {"url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20"}, {"url": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c"}], "title": "iommu/vt-d: Remove WO permissions on second-level paging entries", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47035", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-05T18:13:47.892266Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:14:09.941Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.557Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c", "tags": ["x_transferred"]}]}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.557Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47035", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-05T18:13:47.892266Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-23T19:01:15.551Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "iommu/vt-d: Remove WO permissions on second-level paging entries", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b802d070a52a", "lessThan": "c848416cc05a", "versionType": "git"}, {"status": "affected", "version": "b802d070a52a", "lessThan": "89bd62079870", "versionType": "git"}, {"status": "affected", "version": "b802d070a52a", "lessThan": "25faff781389", "versionType": "git"}, {"status": "affected", "version": "b802d070a52a", "lessThan": "66c24699f266", "versionType": "git"}, {"status": "affected", "version": "b802d070a52a", "lessThan": "eea53c581688", "versionType": "git"}], "programFiles": ["drivers/iommu/intel/iommu.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.6"}, {"status": "unaffected", "version": "0", "lessThan": "5.6", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.37", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.10.38", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.21", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.4", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/iommu/intel/iommu.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3"}, {"url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2"}, {"url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0"}, {"url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20"}, {"url": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Remove WO permissions on second-level paging entries\n\nWhen the first level page table is used for IOVA translation, it only\nsupports Read-Only and Read-Write permissions. The Write-Only permission\nis not supported as the PRESENT bit (implying Read permission) should\nalways set. When using second level, we still give separate permissions\nthat allows WriteOnly which seems inconsistent and awkward. We want to\nhave consistent behavior. After moving to 1st level, we don't want things\nto work sometimes, and break if we use 2nd level for the same mappings.\nHence remove this configuration."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T11:58:09.516Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47035", "state": "PUBLISHED", "dateUpdated": "2024-11-04T11:58:09.516Z", "dateReserved": "2024-02-27T18:42:55.964Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-28T08:13:43.404Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Remove WO permissions on second-level paging entries\n\nWhen the first level page table is used for IOVA translation, it only\nsupports Read-Only and Read-Write permissions. The Write-Only permission\nis not supported as the PRESENT bit (implying Read permission) should\nalways set. When using second level, we still give separate permissions\nthat allows WriteOnly which seems inconsistent and awkward. We want to\nhave consistent behavior. After moving to 1st level, we don't want things\nto work sometimes, and break if we use 2nd level for the same mappings.\nHence remove this configuration."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/vt-d: elimina los permisos WO en las entradas de paginaci\u00f3n de segundo nivel. Cuando la tabla de p\u00e1ginas de primer nivel se utiliza para la traducci\u00f3n IOVA, solo admite permisos de solo lectura y lectura-escritura. . El permiso de s\u00f3lo escritura no se admite ya que el bit PRESENTE (que implica permiso de lectura) siempre debe establecerse. Cuando usamos el segundo nivel, todav\u00eda otorgamos permisos separados que permiten WriteOnly, lo que parece inconsistente e inc\u00f3modo. Queremos tener un comportamiento consistente. Despu\u00e9s de pasar al primer nivel, no queremos que las cosas funcionen a veces y se rompan si usamos el segundo nivel para las mismas asignaciones. Por lo tanto, elimine esta configuraci\u00f3n."}], "id": "CVE-2021-47035", "lastModified": "2024-02-28T14:06:45.783", "metrics": {}, "published": "2024-02-28T09:15:39.757", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: iommu/vt-d: Remove WO permissions on second-level paging entries", "id": "2266992", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266992"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\niommu/vt-d: Remove WO permissions on second-level paging entries\nWhen the first level page table is used for IOVA translation, it only\nsupports Read-Only and Read-Write permissions. The Write-Only permission\nis not supported as the PRESENT bit (implying Read permission) should\nalways set. When using second level, we still give separate permissions\nthat allows WriteOnly which seems inconsistent and awkward. We want to\nhave consistent behavior. After moving to 1st level, we don't want things\nto work sometimes, and break if we use 2nd level for the same mappings.\nHence remove this configuration."], "name": "CVE-2021-47035", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47035\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47035\nhttps://lore.kernel.org/linux-cve-announce/2024022836-CVE-2021-47035-e152@gregkh/T/#u"], "threat_severity": "Low", "upstream_fix": "kernel 5.10.37, kernel 5.10.38, kernel 5.11.21, kernel 5.12.4, kernel 5.13"}