CVE-2021-33656

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

CVSS v3.0 6.8 MEDIUM

6.8^/10

CVSS v3.0 : 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
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://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel	Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/07/19/3	Mailing List Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

Configurations

Configuration 1 (hide)

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

Configuration 2 (hide)

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

Information

Published : 2022-07-18 08:15

Updated : 2022-10-02 12:15

NVD link : CVE-2021-33656

Mitre link : CVE-2021-33656

JSON object : View

CWE

CWE-787

Out-of-bounds Write

Products Affected

linux

linux_kernel

huawei

openeuler

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"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", "name": "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"], "refsource": "MISC"}, {"url": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel", "name": "https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "http://www.openwall.com/lists/oss-security/2022/07/19/3", "name": "[oss-security] 20220719 CVE-2021-33656: Linux kernel: When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.(<5.10.127)", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html", "name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update", "tags": [], "refsource": "MLIST"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-787"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-33656", "ASSIGNER": "securities@openeuler.org"}}, "impact": {"baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2022-07-18T15:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:huawei:openeuler:20.03:sp3:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:huawei:openeuler:20.03:sp1:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:huawei:openeuler:20.03:-:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.10.127"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-10-02T19:15Z"}

6.8 /10