CVE-2021-47478 - OpenCVE

In the Linux kernel, the following vulnerability has been resolved: isofs: Fix out of bound access for corrupted isofs image When isofs image is suitably corrupted isofs_read_inode() can read data beyond the end of buffer. Sanity-check the directory entry length before using it.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

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/156ce5bb6cc43a80a743810199defb1dc3f55b7f
https://git.kernel.org/stable/c/6e80e9314f8bb52d9eabe1907698718ff01120f5
https://git.kernel.org/stable/c/86d4aedcbc69c0f84551fb70f953c24e396de2d7
https://git.kernel.org/stable/c/9ec33a9b8790c212cc926a88c5e2105f97f3f57e
https://git.kernel.org/stable/c/afbd40f425227e661d991757e11cc4db024e761f
https://git.kernel.org/stable/c/b0ddff8d68f2e43857a84dce54c3deab181c8ae1
https://git.kernel.org/stable/c/b2fa1f52d22c5455217b294629346ad23a744945
https://git.kernel.org/stable/c/e7fb722586a2936b37bdff096c095c30ca06404d
https://git.kernel.org/stable/c/e96a1866b40570b5950cda8602c2819189c62a48
https://lore.kernel.org/linux-cve-announce/2024052237-CVE-2021-47478-c124@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2021-47478
https://www.cve.org/CVERecord?id=CVE-2021-47478

History

Thu, 07 Nov 2024 16:15:00 +0000

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}`

Mon, 04 Nov 2024 12:15:00 +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: 2024-05-22T08:19:31.521Z

Updated: 2024-11-07T15:12:42.793Z

Reserved: 2024-05-22T06:20:56.200Z

Link: CVE-2021-47478

Vulnrichment

Updated: 2024-08-04T05:39:59.618Z

NVD

Status : Awaiting Analysis

Published: 2024-05-22T09:15:09.747

Modified: 2024-11-07T16:35:04.167

Link: CVE-2021-47478

Redhat

Severity : Moderate

Publid Date: 2024-05-22T00:00:00Z

Links: CVE-2021-47478 - Bugzilla

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Sanity-check the directory entry length before\nusing it."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-04T12:06:42.521Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47478", "state": "PUBLISHED", "dateUpdated": "2024-11-07T15:12:42.793Z", "dateReserved": "2024-05-22T06:20:56.200Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-22T08:19:31.521Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: Fix out of bound access for corrupted isofs image\n\nWhen isofs image is suitably corrupted isofs_read_inode() can read data\nbeyond the end of buffer. Sanity-check the directory entry length before\nusing it."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: isofs: corrige el acceso fuera de los l\u00edmites para una imagen isofs corrupta. Cuando la imagen isofs est\u00e1 adecuadamente da\u00f1ada, isofs_read_inode() puede leer datos m\u00e1s all\u00e1 del final del b\u00fafer. Cordura: verifique la longitud de la entrada del directorio antes de usarla."}], "id": "CVE-2021-47478", "lastModified": "2024-11-07T16:35:04.167", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-05-22T09:15:09.747", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/156ce5bb6cc43a80a743810199defb1dc3f55b7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e80e9314f8bb52d9eabe1907698718ff01120f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86d4aedcbc69c0f84551fb70f953c24e396de2d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ec33a9b8790c212cc926a88c5e2105f97f3f57e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afbd40f425227e661d991757e11cc4db024e761f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0ddff8d68f2e43857a84dce54c3deab181c8ae1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b2fa1f52d22c5455217b294629346ad23a744945"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e7fb722586a2936b37bdff096c095c30ca06404d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e96a1866b40570b5950cda8602c2819189c62a48"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: isofs: Fix out of bound access for corrupted isofs image", "id": "2282945", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282945"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nisofs: Fix out of bound access for corrupted isofs image\nWhen isofs image is suitably corrupted isofs_read_inode() can read data\nbeyond the end of buffer. Sanity-check the directory entry length before\nusing it."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2021-47478", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2024-05-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47478\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47478\nhttps://lore.kernel.org/linux-cve-announce/2024052237-CVE-2021-47478-c124@gregkh/T"], "statement": "Red Hat Enterprise Linux is not impacted by this CVE, as the vulnerability in question does not affect the specific versions or configurations of the Linux kernel used in its distributions. This ensures that users of Red Hat Enterprise Linux are not exposed to the potential risks associated with this issue, and no further action or mitigation is necessary for systems running this operating system.", "threat_severity": "Moderate", "upstream_fix": "kernel 4.4.292, kernel 4.9.290, kernel 4.14.255, kernel 4.19.217, kernel 5.4.159, kernel 5.10.79, kernel 5.14.18, kernel 5.15.2, kernel 5.16"}