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ID

VAR-202202-1712


CVE

CVE-2021-30771


TITLE

plural  Apple  Out-of-bounds write vulnerabilities in the product

Trust: 0.8

sources: JVNDB: JVNDB-2021-019489

DESCRIPTION

An out-of-bounds write was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.4, iOS 14.6 and iPadOS 14.6, watchOS 7.5, tvOS 14.6. Processing a maliciously crafted font file may lead to arbitrary code execution. plural Apple The product contains a vulnerability related to out-of-bounds writes.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple macOS. Interaction with the libFontParser library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.The specific flaw exists within the parsing of TTF fonts. Crafted data in a TTF font can trigger a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of the current process. Apple macOS is a set of dedicated operating systems developed by Apple Corporation for Mac computers

Trust: 2.34

sources: NVD: CVE-2021-30771 // JVNDB: JVNDB-2021-019489 // ZDI: ZDI-22-377 // VULHUB: VHN-390504

AFFECTED PRODUCTS

vendor:applemodel:tvosscope:ltversion:14.6

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vendor:applemodel:watchosscope:ltversion:7.5

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vendor:applemodel:iphone osscope:ltversion:14.6

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vendor:applemodel:macosscope:gteversion:11.0

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vendor:applemodel:macosscope:ltversion:11.4

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vendor:applemodel:ipadosscope:ltversion:14.6

Trust: 1.0

vendor:アップルmodel:ipadosscope: - version: -

Trust: 0.8

vendor:アップルmodel:tvosscope: - version: -

Trust: 0.8

vendor:アップルmodel:macosscope: - version: -

Trust: 0.8

vendor:アップルmodel:iosscope: - version: -

Trust: 0.8

vendor:アップルmodel:watchosscope:eqversion:7.5

Trust: 0.8

vendor:applemodel:macosscope: - version: -

Trust: 0.7

sources: ZDI: ZDI-22-377 // JVNDB: JVNDB-2021-019489 // NVD: CVE-2021-30771

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-30771
value: HIGH

Trust: 1.0

NVD: CVE-2021-30771
value: HIGH

Trust: 0.8

ZDI: CVE-2021-30771
value: HIGH

Trust: 0.7

CNNVD: CNNVD-202202-1343
value: HIGH

Trust: 0.6

VULHUB: VHN-390504
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2021-30771
severity: MEDIUM
baseScore: 6.8
vectorString: AV:N/AC:M/AU:N/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.8

VULHUB: VHN-390504
severity: MEDIUM
baseScore: 6.8
vectorString: AV:N/AC:M/AU:N/C:P/I:P/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: PARTIAL
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 6.4
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

nvd@nist.gov: CVE-2021-30771
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 1.8
impactScore: 5.9
version: 3.1

Trust: 1.0

NVD: CVE-2021-30771
baseSeverity: HIGH
baseScore: 7.8
vectorString: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

ZDI: CVE-2021-30771
baseSeverity: HIGH
baseScore: 7.8
vectorString: AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 1.8
impactScore: 5.9
version: 3.0

Trust: 0.7

sources: ZDI: ZDI-22-377 // VULHUB: VHN-390504 // JVNDB: JVNDB-2021-019489 // CNNVD: CNNVD-202202-1343 // NVD: CVE-2021-30771

PROBLEMTYPE DATA

problemtype:CWE-787

Trust: 1.1

problemtype:Out-of-bounds writing (CWE-787) [NVD evaluation ]

Trust: 0.8

sources: VULHUB: VHN-390504 // JVNDB: JVNDB-2021-019489 // NVD: CVE-2021-30771

THREAT TYPE

local

Trust: 0.6

sources: CNNVD: CNNVD-202202-1343

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202202-1343

PATCH

title:HT212532 Apple Security Updatesurl:https://support.apple.com/en-us/HT212528

Trust: 0.8

title:Apple has issued an update to correct this vulnerability.url:https://support.apple.com/en-us/HT212529

Trust: 0.7

title:Apple macOS Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=182293

Trust: 0.6

sources: ZDI: ZDI-22-377 // JVNDB: JVNDB-2021-019489 // CNNVD: CNNVD-202202-1343

EXTERNAL IDS

db:NVDid:CVE-2021-30771

Trust: 4.0

db:ZDIid:ZDI-22-377

Trust: 1.3

db:JVNDBid:JVNDB-2021-019489

Trust: 0.8

db:ZDI_CANid:ZDI-CAN-13835

Trust: 0.7

db:CNNVDid:CNNVD-202202-1343

Trust: 0.7

db:VULHUBid:VHN-390504

Trust: 0.1

sources: ZDI: ZDI-22-377 // VULHUB: VHN-390504 // JVNDB: JVNDB-2021-019489 // CNNVD: CNNVD-202202-1343 // NVD: CVE-2021-30771

REFERENCES

url:https://support.apple.com/en-us/ht212529

Trust: 2.4

url:https://support.apple.com/en-us/ht212528

Trust: 1.7

url:https://support.apple.com/en-us/ht212532

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url:https://support.apple.com/en-us/ht212533

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url:https://nvd.nist.gov/vuln/detail/cve-2021-30771

Trust: 0.8

url:https://cxsecurity.com/cveshow/cve-2021-30771/

Trust: 0.6

url:https://www.zerodayinitiative.com/advisories/zdi-22-377/

Trust: 0.6

sources: ZDI: ZDI-22-377 // VULHUB: VHN-390504 // JVNDB: JVNDB-2021-019489 // CNNVD: CNNVD-202202-1343 // NVD: CVE-2021-30771

CREDITS

Mickey Jin (@patch1t) of Trend Micro

Trust: 1.3

sources: ZDI: ZDI-22-377 // CNNVD: CNNVD-202202-1343

SOURCES

db:ZDIid:ZDI-22-377
db:VULHUBid:VHN-390504
db:JVNDBid:JVNDB-2021-019489
db:CNNVDid:CNNVD-202202-1343
db:NVDid:CVE-2021-30771

LAST UPDATE DATE

2024-08-14T14:10:59.497000+00:00


SOURCES UPDATE DATE

db:ZDIid:ZDI-22-377date:2022-02-16T00:00:00
db:VULHUBid:VHN-390504date:2022-03-25T00:00:00
db:JVNDBid:JVNDB-2021-019489date:2023-08-02T07:03:00
db:CNNVDid:CNNVD-202202-1343date:2022-03-28T00:00:00
db:NVDid:CVE-2021-30771date:2022-03-25T19:23:53.380

SOURCES RELEASE DATE

db:ZDIid:ZDI-22-377date:2022-02-16T00:00:00
db:VULHUBid:VHN-390504date:2022-03-18T00:00:00
db:JVNDBid:JVNDB-2021-019489date:2023-08-02T00:00:00
db:CNNVDid:CNNVD-202202-1343date:2022-02-16T00:00:00
db:NVDid:CVE-2021-30771date:2022-03-18T18:15:11.570