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ID

VAR-202104-0169


CVE

CVE-2020-27921


TITLE

macOS Big Sur  Vulnerability in symbolic link path validation logic in

Trust: 0.8

sources: JVNDB: JVNDB-2020-017298

DESCRIPTION

A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, macOS Big Sur 11.0.1. An application may be able to execute arbitrary code with kernel privileges. macOS Big Sur contains a symbolic link path validation logic vulnerability due to a flaw in path sanitization.A local attacker could elevate their privileges. Apple macOS is a set of dedicated operating systems developed by Apple Corporation for Mac computers. There is a security vulnerability in Apple macOS. There is no information about this vulnerability at present. Please keep an eye on CNNVD or manufacturer announcements. Apple macOS could allow a local malicious user to gain elevated privileges on the system, caused by a race condition in the Kernel component

Trust: 1.8

sources: NVD: CVE-2020-27921 // JVNDB: JVNDB-2020-017298 // VULHUB: VHN-372032 // VULMON: CVE-2020-27921

AFFECTED PRODUCTS

vendor:applemodel:mac os xscope:ltversion:11.1.0

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vendor:applemodel:mac os xscope:ltversion:11.0.1

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vendor:アップルmodel:apple mac os xscope:eqversion: -

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vendor:アップルmodel:apple mac os xscope:eqversion:11.0.1

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vendor:アップルmodel:apple mac os xscope: - version: -

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vendor:アップルmodel:apple mac os xscope:eqversion:11.1.0

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sources: JVNDB: JVNDB-2020-017298 // NVD: CVE-2020-27921

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2020-27921
value: HIGH

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NVD: CVE-2020-27921
value: HIGH

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CNNVD: CNNVD-202012-1080
value: HIGH

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VULHUB: VHN-372032
value: HIGH

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VULMON: CVE-2020-27921
value: HIGH

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nvd@nist.gov: CVE-2020-27921
severity: HIGH
baseScore: 9.3
vectorString: AV:N/AC:M/AU:N/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: 8.6
impactScore: 10.0
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.9

VULHUB: VHN-372032
severity: HIGH
baseScore: 9.3
vectorString: AV:N/AC:M/AU:N/C:C/I:C/A:C
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: COMPLETE
integrityImpact: COMPLETE
availabilityImpact: COMPLETE
exploitabilityScore: 8.6
impactScore: 10.0
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

nvd@nist.gov: CVE-2020-27921
baseSeverity: HIGH
baseScore: 7.0
vectorString: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: 1.0
impactScore: 5.9
version: 3.1

Trust: 1.0

NVD: CVE-2020-27921
baseSeverity: HIGH
baseScore: 7.0
vectorString: CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
attackVector: LOCAL
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: HIGH
availabilityImpact: HIGH
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: VULHUB: VHN-372032 // VULMON: CVE-2020-27921 // JVNDB: JVNDB-2020-017298 // CNNVD: CNNVD-202012-1080 // NVD: CVE-2020-27921

PROBLEMTYPE DATA

problemtype:CWE-362

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problemtype:Race condition (CWE-362) [NVD evaluation ]

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sources: VULHUB: VHN-372032 // JVNDB: JVNDB-2020-017298 // NVD: CVE-2020-27921

THREAT TYPE

local

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sources: CNNVD: CNNVD-202012-1080

TYPE

competition condition problem

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sources: CNNVD: CNNVD-202012-1080

PATCH

title:HT211931 Apple  Security updateurl:https://support.apple.com/en-us/HT211931

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title:Apple macOS Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=137033

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title:Apple: macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojaveurl:https://vulmon.com/vendoradvisory?qidtp=apple_security_advisories&qid=60a51a6d3f600c46241622f208f75bff

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sources: VULMON: CVE-2020-27921 // JVNDB: JVNDB-2020-017298 // CNNVD: CNNVD-202012-1080

EXTERNAL IDS

db:NVDid:CVE-2020-27921

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db:JVNid:JVNVU95288122

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db:JVNid:JVNVU99462952

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db:JVNDBid:JVNDB-2020-017298

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db:AUSCERTid:ESB-2020.4060.2

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db:CNNVDid:CNNVD-202012-1080

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db:VULHUBid:VHN-372032

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db:VULMONid:CVE-2020-27921

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sources: VULHUB: VHN-372032 // VULMON: CVE-2020-27921 // JVNDB: JVNDB-2020-017298 // CNNVD: CNNVD-202012-1080 // NVD: CVE-2020-27921

REFERENCES

url:https://support.apple.com/en-us/ht211931

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url:https://support.apple.com/en-us/ht212011

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url:https://nvd.nist.gov/vuln/detail/cve-2020-27921

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url:https://jvn.jp/vu/jvnvu99462952/

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url:https://jvn.jp/vu/jvnvu95288122/

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url:https://vigilance.fr/vulnerability/apple-macos-multiple-vulnerabilities-34108

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url:https://www.auscert.org.au/bulletins/esb-2020.4060.2/

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url:https://cwe.mitre.org/data/definitions/362.html

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url:https://nvd.nist.gov

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url:https://exchange.xforce.ibmcloud.com/vulnerabilities/193111

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sources: VULHUB: VHN-372032 // VULMON: CVE-2020-27921 // JVNDB: JVNDB-2020-017298 // CNNVD: CNNVD-202012-1080 // NVD: CVE-2020-27921

SOURCES

db:VULHUBid:VHN-372032
db:VULMONid:CVE-2020-27921
db:JVNDBid:JVNDB-2020-017298
db:CNNVDid:CNNVD-202012-1080
db:NVDid:CVE-2020-27921

LAST UPDATE DATE

2024-11-23T20:50:54.329000+00:00


SOURCES UPDATE DATE

db:VULHUBid:VHN-372032date:2021-04-06T00:00:00
db:VULMONid:CVE-2020-27921date:2021-04-06T00:00:00
db:JVNDBid:JVNDB-2020-017298date:2022-09-07T02:13:00
db:CNNVDid:CNNVD-202012-1080date:2021-04-07T00:00:00
db:NVDid:CVE-2020-27921date:2024-11-21T05:22:03.437

SOURCES RELEASE DATE

db:VULHUBid:VHN-372032date:2021-04-02T00:00:00
db:VULMONid:CVE-2020-27921date:2021-04-02T00:00:00
db:JVNDBid:JVNDB-2020-017298date:2022-09-07T00:00:00
db:CNNVDid:CNNVD-202012-1080date:2020-12-15T00:00:00
db:NVDid:CVE-2020-27921date:2021-04-02T18:15:15.700