Details of VAR-202106-0921

ID

VAR-202106-0921

CVE

CVE-2021-21281

TITLE

Contiki-NG Buffer Overflow Vulnerability in Linux

Trust: 0.8

sources: JVNDB: JVNDB-2021-008308

DESCRIPTION

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. A buffer overflow vulnerability exists in Contiki-NG versions prior to 4.6. After establishing a TCP socket using the tcp-socket library, it is possible for the remote end to send a packet with a data offset that is unvalidated. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround. Contiki-NG Contains a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state. The vulnerability stems from unverified TCP data offset. An attacker can use this vulnerability to cause a denial of service. Pillow is a Python-based image processing library. There is currently no information about this vulnerability, please feel free to follow CNNVD or manufacturer announcements

Trust: 3.24

sources: NVD: CVE-2021-21281 // JVNDB: JVNDB-2021-008308 // CNVD: CNVD-2021-44272 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202106-1427

IOT TAXONOMY

category:

['IoT']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-44272

AFFECTED PRODUCTS

vendor:	contiki ng	model:	contiki-ng	scope:	lt	version:	4.6	Trust: 1.6
vendor:	contiki ng	model:	contiki-ng	scope:	eq	version:	-	Trust: 0.8
vendor:	contiki ng	model:	contiki-ng	scope:	eq	version:	4.6	Trust: 0.8

sources: CNVD: CNVD-2021-44272 // JVNDB: JVNDB-2021-008308 // NVD: CVE-2021-21281

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-21281
value:	CRITICAL
Trust: 1.0
security-advisories@github.com:	CVE-2021-21281
value:	HIGH
Trust: 1.0
NVD:	CVE-2021-21281
value:	CRITICAL
Trust: 0.8
CNVD:	CNVD-2021-44272
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202104-975
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202106-1427
value:	CRITICAL
Trust: 0.6

nvd@nist.gov:	CVE-2021-21281
severity:	HIGH
baseScore:	7.5
vectorString:	AV:N/AC:L/AU:N/C:P/I:P/A:P
accessVector:	NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	10.0
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
CNVD:	CNVD-2021-44272
severity:	MEDIUM
baseScore:	6.6
vectorString:	AV:N/AC:H/AU:N/C:P/I:P/A:C
accessVector:	NETWORK
accessComplexity:	HIGH
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	COMPLETE
exploitabilityScore:	4.9
impactScore:	8.5
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2021-21281
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	3.9
impactScore:	5.9
version:	3.1
Trust: 1.0
security-advisories@github.com:	CVE-2021-21281
baseSeverity:	HIGH
baseScore:	7.0
vectorString:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	LOW
availabilityImpact:	HIGH
exploitabilityScore:	2.2
impactScore:	4.7
version:	3.1
Trust: 1.0
NVD:	CVE-2021-21281
baseSeverity:	CRITICAL
baseScore:	9.8
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2021-44272 // JVNDB: JVNDB-2021-008308 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202106-1427 // NVD: CVE-2021-21281 // NVD: CVE-2021-21281

PROBLEMTYPE DATA

problemtype:	CWE-120	Trust: 1.0
problemtype:	Classic buffer overflow (CWE-120) [ Other ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-008308 // NVD: CVE-2021-21281

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202106-1427

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202104-975

PATCH

title:	Verify the TCP data offset to avoid uip_len overflows. #1366 GitHub	url:	https://github.com/contiki-ng/contiki-ng/pull/1366	Trust: 0.8
title:	Patch for Contiki-NG buffer overflow vulnerability	url:	https://www.cnvd.org.cn/patchInfo/show/274521	Trust: 0.6
title:	Contiki-NG Buffer error vulnerability fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=155317	Trust: 0.6

sources: CNVD: CNVD-2021-44272 // JVNDB: JVNDB-2021-008308 // CNNVD: CNNVD-202106-1427

EXTERNAL IDS

db:	NVD	id:	CVE-2021-21281	Trust: 3.8
db:	JVNDB	id:	JVNDB-2021-008308	Trust: 0.8
db:	CNVD	id:	CNVD-2021-44272	Trust: 0.6
db:	CS-HELP	id:	SB2021041363	Trust: 0.6
db:	CNNVD	id:	CNNVD-202104-975	Trust: 0.6
db:	CS-HELP	id:	SB2021062407	Trust: 0.6
db:	CNNVD	id:	CNNVD-202106-1427	Trust: 0.6

sources: CNVD: CNVD-2021-44272 // JVNDB: JVNDB-2021-008308 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202106-1427 // NVD: CVE-2021-21281

REFERENCES

url:	https://github.com/contiki-ng/contiki-ng/security/advisories/ghsa-mc42-fqfr-h9fp	Trust: 1.6
url:	https://github.com/contiki-ng/contiki-ng/pull/1366	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2021-21281	Trust: 1.4
url:	https://www.cybersecurity-help.cz/vdb/sb2021041363	Trust: 0.6
url:	https://www.cybersecurity-help.cz/vdb/sb2021062407	Trust: 0.6

sources: CNVD: CNVD-2021-44272 // JVNDB: JVNDB-2021-008308 // CNNVD: CNNVD-202104-975 // CNNVD: CNNVD-202106-1427 // NVD: CVE-2021-21281

SOURCES

db:	CNVD	id:	CNVD-2021-44272
db:	JVNDB	id:	JVNDB-2021-008308
db:	CNNVD	id:	CNNVD-202104-975
db:	CNNVD	id:	CNNVD-202106-1427
db:	NVD	id:	CVE-2021-21281

LAST UPDATE DATE

2024-08-14T12:51:29.919000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-44272	date:	2021-06-23T00:00:00
db:	JVNDB	id:	JVNDB-2021-008308	date:	2022-03-11T08:51:00
db:	CNNVD	id:	CNNVD-202104-975	date:	2021-04-14T00:00:00
db:	CNNVD	id:	CNNVD-202106-1427	date:	2021-06-28T00:00:00
db:	NVD	id:	CVE-2021-21281	date:	2021-06-24T16:47:39.667

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-44272	date:	2021-06-23T00:00:00
db:	JVNDB	id:	JVNDB-2021-008308	date:	2022-03-11T00:00:00
db:	CNNVD	id:	CNNVD-202104-975	date:	2021-04-13T00:00:00
db:	CNNVD	id:	CNNVD-202106-1427	date:	2021-06-18T00:00:00
db:	NVD	id:	CVE-2021-21281	date:	2021-06-18T21:15:07.850