CVE-2021-33656

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
http://www.openwall.com/lists/oss-security/2022/07/19/3	Mailing List Patch Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch	Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html	Mailing List Third Party Advisory
https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:huawei:openeuler:20.03:-:::lts:::*
	cpe:2.3:o:huawei:openeuler:20.03:sp1:::lts:::*
	cpe:2.3:o:huawei:openeuler:20.03:sp3:::lts:::*

Configuration 2 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-07-18 15:15

Updated : 2022-10-29 02:52

NVD link : CVE-2021-33656

Mitre link : CVE-2021-33656

CVE.ORG link : CVE-2021-33656

JSON object : View

Products Affected

huawei

openeuler

debian

debian_linux

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

{"id": "CVE-2021-33656", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.9}]}, "published": "2022-07-18T15:15:08.043", "references": [{"url": "http://www.openwall.com/lists/oss-security/2022/07/19/3", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "source": "securities@openeuler.org"}, {"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch", "tags": ["Patch", "Third Party Advisory"], "source": "securities@openeuler.org"}, {"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html", "tags": ["Mailing List", "Third Party Advisory"], "source": "securities@openeuler.org"}, {"url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel", "tags": ["Third Party Advisory"], "source": "securities@openeuler.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}, {"type": "Secondary", "source": "securities@openeuler.org", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."}, {"lang": "es", "value": "Cuando es establecida la fuente con datos maliciosos por ioctl cmd PIO_FONT, el kernel escribir\u00e1 memoria fuera de l\u00edmites"}], "lastModified": "2022-10-29T02:52:00.693", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:huawei:openeuler:20.03:-:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "14A33B05-1F3B-457A-9136-3CAD433FDEBA"}, {"criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp1:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "78AA9487-C85C-4F4F-9429-E0496080F7B5"}, {"criteria": "cpe:2.3:o:huawei:openeuler:20.03:sp3:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "2E9E5CF1-3FD7-413A-BD29-0EBA0E1E6766"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0F459694-1B3F-472F-88F7-6E97AD3958DD", "versionEndExcluding": "5.10.127"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "securities@openeuler.org"}

6.8 /10