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ID

VAR-202108-2079


CVE

CVE-2021-30853


TITLE

Apple macOS Big Sur Buffer error vulnerability

Trust: 0.6

sources: CNNVD: CNNVD-202108-2091

DESCRIPTION

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.6. A malicious application may bypass Gatekeeper checks. Information about the security content is also available at https://support.apple.com/HT212804. CoreGraphics Available for: macOS Big Sur Impact: Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited. Description: An integer overflow was addressed with improved input validation. CVE-2021-30860: The Citizen Lab CUPS Available for: macOS Big Sur Impact: A local attacker may be able to elevate their privileges Description: A permissions issue existed. CVE-2021-30827: an anonymous researcher Entry added September 20, 2021 CUPS Available for: macOS Big Sur Impact: A local user may be able to read arbitrary files as root Description: This issue was addressed with improved checks. CVE-2021-30828: an anonymous researcher Entry added September 20, 2021 CUPS Available for: macOS Big Sur Impact: A local user may be able to execute arbitrary files Description: A URI parsing issue was addressed with improved parsing. CVE-2021-30829: an anonymous researcher Entry added September 20, 2021 curl Available for: macOS Big Sur Impact: curl could potentially reveal sensitive internal information to the server using a clear-text network protocol Description: A buffer overflow was addressed with improved input validation. CVE-2021-22925 Entry added September 20, 2021 CVMS Available for: macOS Big Sur Impact: A local attacker may be able to elevate their privileges Description: A memory corruption issue was addressed with improved state management. CVE-2021-30832: Mickey Jin (@patch1t) of Trend Micro Entry added September 20, 2021 FontParser Available for: macOS Big Sur Impact: Processing a maliciously crafted dfont file may lead to arbitrary code execution Description: This issue was addressed with improved checks. CVE-2021-30841: Xingwei Lin of Ant Security Light-Year Lab CVE-2021-30842: Xingwei Lin of Ant Security Light-Year Lab CVE-2021-30843: Xingwei Lin of Ant Security Light-Year Lab Entry added September 20, 2021 Gatekeeper Available for: macOS Big Sur Impact: A malicious application may bypass Gatekeeper checks Description: This issue was addressed with improved checks. CVE-2021-30853: Gordon Long (@ethicalhax) of Box, Inc. Entry added September 20, 2021 ImageIO Available for: macOS Big Sur Impact: Processing a maliciously crafted image may lead to arbitrary code execution Description: This issue was addressed with improved checks. CVE-2021-30847: Mike Zhang of Pangu Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: A memory corruption issue was addressed with improved memory handling. CVE-2021-30830: Zweig of Kunlun Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: An out-of-bounds read was addressed with improved input validation. CVE-2021-30865: Zweig of Kunlun Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: A race condition was addressed with improved locking. CVE-2021-30857: Zweig of Kunlun Lab Entry added September 20, 2021 Kernel Available for: macOS Big Sur Impact: A malicious application may be able to execute arbitrary code with kernel privileges Description: A type confusion issue was addressed with improved state handling. CVE-2021-30859: Apple Entry added September 20, 2021 libexpat Available for: macOS Big Sur Impact: A remote attacker may be able to cause a denial of service Description: This issue was addressed by updating expat to version 2.4.1. CVE-2013-0340: an anonymous researcher Entry added September 20, 2021 Preferences Available for: macOS Big Sur Impact: An application may be able to access restricted files Description: A validation issue existed in the handling of symlinks. CVE-2021-30855: Zhipeng Huo (@R3dF09) and Yuebin Sun (@yuebinsun2020) of Tencent Security Xuanwu Lab (xlab.tencent.com) Entry added September 20, 2021 Sandbox Available for: macOS Big Sur Impact: A user may gain access to protected parts of the file system Description: An access issue was addressed with improved access restrictions. CVE-2021-30850: an anonymous researcher Entry added September 20, 2021 SMB Available for: macOS Big Sur Impact: A local user may be able to read kernel memory Description: An out-of-bounds read was addressed with improved bounds checking. CVE-2021-30845: Peter Nguyen Vu Hoang of STAR Labs Entry added September 20, 2021 SMB Available for: macOS Big Sur Impact: A remote attacker may be able to leak memory Description: A logic issue was addressed with improved state management. CVE-2021-30844: Peter Nguyen Vu Hoang of STAR Labs Entry added September 20, 2021 WebKit Available for: macOS Big Sur Impact: Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited. CVE-2021-30858: an anonymous researcher Additional recognition APFS We would like to acknowledge Koh M. Nakagawa of FFRI Security, Inc. for their assistance. Entry added September 20, 2021 App Support We would like to acknowledge @CodeColorist, an anonymous researcher for their assistance. Entry added September 20, 2021 CoreML We would like to acknowledge hjy79425575 working with Trend Micro Zero Day Initiative for their assistance. Entry added September 20, 2021 CUPS We would like to acknowledge an anonymous researcher for their assistance. Entry added September 20, 2021 Kernel We would like to acknowledge Anthony Steinhauser of Google's Safeside project for their assistance. Entry added September 20, 2021 Sandbox We would like to acknowledge Csaba Fitzl (@theevilbit) of Offensive Security for their assistance. Entry added September 20, 2021 smbx We would like to acknowledge Zhongcheng Li (CK01) for their assistance. Entry added September 20, 2021 Installation note: This update may be obtained from the Mac App Store or Apple's Software Downloads web site: https://support.apple.com/downloads/ Information will also be posted to the Apple Security Updates web site: https://support.apple.com/kb/HT201222 This message is signed with Apple's Product Security PGP key, and details are available at: https://www.apple.com/support/security/pgp/ -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEePiLW1MrMjw19XzoeC9qKD1prhgFAmFI888ACgkQeC9qKD1p rhi/Bg/9GiqXl8sxPjDpATJqneZ1GcAxWxBZgkFrcLV/cMwrVqniWsOeVHqHjMSY eJUkGehUtKsYE0g8Uk0qJqOUl3dxxGJpIDytOQJB3TFdd1BpZSK/tOChVem1JV1B +CMhqDnmR/u7bLqfCr1p6J5QJNHjTjgBA4RthdzZZ52pLGql7/2qfaJwpeHkheS4 5EKmch8zh0CGRqrUTg1HgY67ierNsz47jIU6n7UeMwjskRU3xM9VqJ9s4eKGAtSv 4Ry16pv0xUZ4cmL5EiLm2/eFbY8ByCji7jYPP0POBO4l518TGpaX2PaZBP9v0rrD t6cPEZHnsRaZ49OYak6z9iA8teKGSs6aCMuzSxExvlT8+YySf1o1nefbRH/tZMfn bwSO0ZyPsS9WYyuG/zX08U3CKOTkjqhLaOwVwte+cAeg2QS85aa9XPMG6PKcpyfu R7auxS92+Dg+R+97dAsI9TprSutCTw4iY8lyK9MVJSnh+zQSZEihUh4EaSufTHRC NlOSHvsTfXqsHaeed6sVKyX4ADHCUvRbCCIrqJKUs6waNd2T2XF7SzvgTSDJMHU9 4AL/jpnltTjDJTtMO999VZKNzYurrGiHvBs5zHWr91+eaHW8YGdsDERsX3BFYLe3 85i+Yge0iXlP7mT32cWxIw4AWDFITFiHnmV1/cdsCd2GIkqkhFw= =9bjT -----END PGP SIGNATURE-----

Trust: 1.17

sources: NVD: CVE-2021-30853 // VULHUB: VHN-390586 // VULMON: CVE-2021-30853 // PACKETSTORM: 164246

AFFECTED PRODUCTS

vendor:applemodel:macosscope:ltversion:11.6

Trust: 1.0

sources: NVD: CVE-2021-30853

CVSS

SEVERITY

CVSSV2

CVSSV3

NVD: CVE-2021-30853
value: MEDIUM

Trust: 1.0

CNNVD: CNNVD-202108-2091
value: MEDIUM

Trust: 0.6

VULHUB: VHN-390586
value: MEDIUM

Trust: 0.1

VULMON: CVE-2021-30853
value: MEDIUM

Trust: 0.1

NVD:
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: FALSE
obtainAllPrivilege: FALSE
obtainUserPrivilege: FALSE
obtainOtherPrivilege: FALSE
userInteractionRequired: TRUE
version: 2.0

Trust: 1.0

VULHUB: VHN-390586
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

VULMON: CVE-2021-30853
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

NVD:
baseSeverity: MEDIUM
baseScore: 5.5
vectorString: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
attackVector: LOCAL
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: REQUIRED
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: NONE
exploitabilityScore: 1.8
impactScore: 3.6
version: 3.1

Trust: 1.0

sources: VULHUB: VHN-390586 // VULMON: CVE-2021-30853 // CNNVD: CNNVD-202108-2091 // NVD: CVE-2021-30853

PROBLEMTYPE DATA

problemtype:CWE-787

Trust: 1.1

sources: VULHUB: VHN-390586 // NVD: CVE-2021-30853

THREAT TYPE

local

Trust: 0.6

sources: CNNVD: CNNVD-202108-2091

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202108-2091

CONFIGURATIONS

sources:
            
            
            NVD: CVE-2021-30853

PATCH
title:Apple macOS Big Sur Buffer error vulnerability fixurl:http://www.cnnvd.org.cn/web/xxk/bdxqbyid.tag?id=168188
Trust: 0.6
title:CVE-2021-30853url:https://github.com/shubham0d/cve-2021-30853 
Trust: 0.1
title:https://github.com/houjingyi233/macOS-iOS-system-securityurl:https://github.com/houjingyi233/macos-ios-system-security 
Trust: 0.1
title:https://github.com/houjingyi233/macos-ios-exploit-writeupurl:https://github.com/houjingyi233/macos-ios-exploit-writeup 
Trust: 0.1
title:PoC in GitHuburl:https://github.com/soosmile/poc 
Trust: 0.1
sources:
            
            
            VULMON: CVE-2021-30853 // 
            
            
            
            CNNVD: CNNVD-202108-2091

EXTERNAL IDS
db:NVDid:CVE-2021-30853
Trust: 1.9
db:PACKETSTORMid:164246
Trust: 0.7
db:AUSCERTid:ESB-2021.3101.2
Trust: 0.6
db:CNNVDid:CNNVD-202108-2091
Trust: 0.6
db:VULHUBid:VHN-390586
Trust: 0.1
db:VULMONid:CVE-2021-30853
Trust: 0.1
sources:
            
            
            VULHUB: VHN-390586 // 
            
            
            
            VULMON: CVE-2021-30853 // 
            
            
            
            PACKETSTORM: 164246 // 
            
            
            
            CNNVD: CNNVD-202108-2091 // 
            
            
            
            NVD: CVE-2021-30853

REFERENCES
url:https://support.apple.com/en-us/ht212804
Trust: 2.4
url:https://www.auscert.org.au/bulletins/esb-2021.3101.2
Trust: 0.6
url:https://packetstormsecurity.com/files/164246/apple-security-advisory-2021-09-20-7.html
Trust: 0.6
url:https://vigilance.fr/vulnerability/apple-ios-macos-multiple-vulnerabilities-36461
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url:https://cwe.mitre.org/data/definitions/787.html
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url:https://nvd.nist.gov
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url:https://github.com/shubham0d/cve-2021-30853
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url:https://nvd.nist.gov/vuln/detail/cve-2021-22925
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30830
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30832
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url:https://support.apple.com/kb/ht201222
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30828
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url:https://nvd.nist.gov/vuln/detail/cve-2013-0340
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30858
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30841
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30855
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30843
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30844
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url:https://support.apple.com/downloads/
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30859
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30829
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30853
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url:https://www.apple.com/support/security/pgp/
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30857
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30845
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30850
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30865
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url:https://support.apple.com/ht212804.
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30847
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30842
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30860
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url:https://nvd.nist.gov/vuln/detail/cve-2021-30827
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sources:
            
            
            VULHUB: VHN-390586 // 
            
            
            
            VULMON: CVE-2021-30853 // 
            
            
            
            PACKETSTORM: 164246 // 
            
            
            
            CNNVD: CNNVD-202108-2091 // 
            
            
            
            NVD: CVE-2021-30853

CREDITS
Apple
Trust: 0.1
sources:
            
            
            PACKETSTORM: 164246

SOURCES
db:VULHUBid:VHN-390586
db:VULMONid:CVE-2021-30853
db:PACKETSTORMid:164246
db:CNNVDid:CNNVD-202108-2091
db:NVDid:CVE-2021-30853

LAST UPDATE DATE
2024-02-13T00:31:49.215000+00:00

SOURCES UPDATE DATE
db:VULHUBid:VHN-390586date:2021-11-01T00:00:00
db:VULMONid:CVE-2021-30853date:2023-11-07T00:00:00
db:CNNVDid:CNNVD-202108-2091date:2021-11-02T00:00:00
db:NVDid:CVE-2021-30853date:2023-11-07T03:33:32.200

SOURCES RELEASE DATE
db:VULHUBid:VHN-390586date:2021-08-24T00:00:00
db:VULMONid:CVE-2021-30853date:2021-08-24T00:00:00
db:PACKETSTORMid:164246date:2021-09-22T16:33:18
db:CNNVDid:CNNVD-202108-2091date:2021-08-24T00:00:00
db:NVDid:CVE-2021-30853date:2021-08-24T19:15:13.833