Details of VAR-202109-0336

ID

VAR-202109-0336

CVE

CVE-2021-1877

TITLE

iOS and iPadOS Out-of-bounds read vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2021-013580

DESCRIPTION

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5. A local user may be able to read kernel memory. Apple Kernel is the kernel of the Apple device of Apple (Apple). A security vulnerability exists in the Apple Kernel due to an out-of-bounds input. The following products and versions are affected: iPhone 6s and later, iPad Pro (all models), iPad Air 2 and later, iPad 5th generation and later, iPad mini 4 and later, and iPod touch (7th generation). APPLE-SA-2021-04-26-1 iOS 14.5 and iPadOS 14.5

Trust: 1.8

sources: NVD: CVE-2021-1877 // JVNDB: JVNDB-2021-013580 // VULHUB: VHN-376537 // VULMON: CVE-2021-1877

AFFECTED PRODUCTS

vendor:	apple	model:	ipados	scope:	lt	version:	14.5	Trust: 1.0
vendor:	apple	model:	iphone os	scope:	lt	version:	14.5	Trust: 1.0
vendor:	アップル	model:	ipados	scope:	-	version:	-	Trust: 0.8
vendor:	アップル	model:	ios	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2021-013580 // NVD: CVE-2021-1877

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-1877
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2021-1877
value:	MEDIUM
Trust: 0.8
CNNVD:	CNNVD-202104-1925
value:	MEDIUM
Trust: 0.6
VULHUB:	VHN-376537
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2021-1877
severity:	MEDIUM
baseScore:	4.9
vectorString:	AV:L/AC:L/AU:N/C:C/I:N/A:N
accessVector:	LOCAL
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	NONE
availabilityImpact:	NONE
exploitabilityScore:	3.9
impactScore:	6.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
VULHUB:	VHN-376537
severity:	MEDIUM
baseScore:	4.9
vectorString:	AV:L/AC:L/AU:N/C:C/I:N/A:N
accessVector:	LOCAL
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	NONE
availabilityImpact:	NONE
exploitabilityScore:	3.9
impactScore:	6.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.1

nvd@nist.gov:	CVE-2021-1877
baseSeverity:	MEDIUM
baseScore:	5.5
vectorString:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	NONE
availabilityImpact:	NONE
exploitabilityScore:	1.8
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2021-1877
baseSeverity:	MEDIUM
baseScore:	5.5
vectorString:	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
attackVector:	LOCAL
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	NONE
availabilityImpact:	NONE
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: VULHUB: VHN-376537 // JVNDB: JVNDB-2021-013580 // CNNVD: CNNVD-202104-1925 // NVD: CVE-2021-1877

PROBLEMTYPE DATA

problemtype:	CWE-125	Trust: 1.1
problemtype:	Out-of-bounds read (CWE-125) [NVD evaluation ]	Trust: 0.8

sources: VULHUB: VHN-376537 // JVNDB: JVNDB-2021-013580 // NVD: CVE-2021-1877

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202104-1925

PATCH

title:	HT212317 Apple Security update	url:	https://support.apple.com/en-us/HT212317	Trust: 0.8
title:	Apple Kernel Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=148602	Trust: 0.6

sources: JVNDB: JVNDB-2021-013580 // CNNVD: CNNVD-202104-1925

EXTERNAL IDS

db:	NVD	id:	CVE-2021-1877	Trust: 3.4
db:	JVNDB	id:	JVNDB-2021-013580	Trust: 0.8
db:	AUSCERT	id:	ESB-2021.1408.2	Trust: 0.6
db:	CNNVD	id:	CNNVD-202104-1925	Trust: 0.6
db:	VULHUB	id:	VHN-376537	Trust: 0.1
db:	VULMON	id:	CVE-2021-1877	Trust: 0.1

sources: VULHUB: VHN-376537 // VULMON: CVE-2021-1877 // JVNDB: JVNDB-2021-013580 // CNNVD: CNNVD-202104-1925 // NVD: CVE-2021-1877

REFERENCES

url:	https://support.apple.com/en-us/ht212317	Trust: 1.7
url:	https://nvd.nist.gov/vuln/detail/cve-2021-1877	Trust: 0.8
url:	https://vigilance.fr/vulnerability/apple-ios-multiple-vulnerabilities-35170	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.1408.2	Trust: 0.6
url:	http://seclists.org/fulldisclosure/2021/apr/49	Trust: 0.1

sources: VULHUB: VHN-376537 // VULMON: CVE-2021-1877 // JVNDB: JVNDB-2021-013580 // CNNVD: CNNVD-202104-1925 // NVD: CVE-2021-1877

SOURCES

db:	VULHUB	id:	VHN-376537
db:	VULMON	id:	CVE-2021-1877
db:	JVNDB	id:	JVNDB-2021-013580
db:	CNNVD	id:	CNNVD-202104-1925
db:	NVD	id:	CVE-2021-1877

LAST UPDATE DATE

2024-08-14T12:55:58.432000+00:00

SOURCES UPDATE DATE

db:	VULHUB	id:	VHN-376537	date:	2021-09-20T00:00:00
db:	JVNDB	id:	JVNDB-2021-013580	date:	2022-09-16T05:02:00
db:	CNNVD	id:	CNNVD-202104-1925	date:	2021-09-09T00:00:00
db:	NVD	id:	CVE-2021-1877	date:	2021-09-20T12:09:40.643

SOURCES RELEASE DATE

db:	VULHUB	id:	VHN-376537	date:	2021-09-08T00:00:00
db:	JVNDB	id:	JVNDB-2021-013580	date:	2022-09-16T00:00:00
db:	CNNVD	id:	CNNVD-202104-1925	date:	2021-04-27T00:00:00
db:	NVD	id:	CVE-2021-1877	date:	2021-09-08T15:15:12.257