Details of VAR-202102-1510

ID

VAR-202102-1510

CVE

CVE-2020-27634

TITLE

Contiki-NG Vulnerability in using inadequate random values in

Trust: 0.8

sources: JVNDB: JVNDB-2020-018055

DESCRIPTION

In Contiki 4.5, TCP ISNs are improperly random. Contiki-NG There is a vulnerability in the use of inadequate random values.Information may be obtained and information may be tampered with. Contiki is an open-source, cross-platform operating system for IoT (Internet of Things) devices. Contiki-NG is an open-source cross-platform operating system for next-generation IoT (Internet of Things) devices. A security feature issue vulnerability exists in uIP, Contiki-OS, and Contiki-NG that could allow an attacker to spoof or destroy a TCP connection

Trust: 2.16

sources: NVD: CVE-2020-27634 // JVNDB: JVNDB-2020-018055 // CNNVD: CNNVD-202102-1072

AFFECTED PRODUCTS

vendor:	contiki ng	model:	contiki-ng	scope:	eq	version:	4.5	Trust: 1.8
vendor:	contiki ng	model:	contiki-ng	scope:	-	version:	-	Trust: 0.8
vendor:	contiki ng	model:	contiki-ng	scope:	eq	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2020-018055 // NVD: CVE-2020-27634

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-27634
value:	CRITICAL
Trust: 1.0
NVD:	CVE-2020-27634
value:	CRITICAL
Trust: 0.8
CNNVD:	CNNVD-202102-1072
value:	HIGH
Trust: 0.6

nvd@nist.gov:	CVE-2020-27634
baseSeverity:	CRITICAL
baseScore:	9.1
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	NONE
exploitabilityScore:	3.9
impactScore:	5.2
version:	3.1
Trust: 1.0
NVD:	CVE-2020-27634
baseSeverity:	CRITICAL
baseScore:	9.1
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	NONE
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2020-018055 // CNNVD: CNNVD-202102-1072 // NVD: CVE-2020-27634

PROBLEMTYPE DATA

problemtype:	CWE-330	Trust: 1.0
problemtype:	Insufficient use of random values (CWE-330) [NVD evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2020-018055 // NVD: CVE-2020-27634

TYPE

security feature problem

Trust: 0.6

sources: CNNVD: CNNVD-202102-1072

PATCH

title:

Repair measures for other vulnerabilities in many products

url:

http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=142359

Trust: 0.6

sources: CNNVD: CNNVD-202102-1072

EXTERNAL IDS

db:	NVD	id:	CVE-2020-27634	Trust: 3.2
db:	ICS CERT	id:	ICSA-21-042-01	Trust: 2.4
db:	JVN	id:	JVNVU90767599	Trust: 0.8
db:	JVNDB	id:	JVNDB-2020-018055	Trust: 0.8
db:	AUSCERT	id:	ESB-2021.0538	Trust: 0.6
db:	CNNVD	id:	CNNVD-202102-1072	Trust: 0.6

sources: JVNDB: JVNDB-2020-018055 // CNNVD: CNNVD-202102-1072 // NVD: CVE-2020-27634

REFERENCES

url:	https://www.cisa.gov/news-events/ics-advisories/icsa-21-042-01	Trust: 1.8
url:	https://www.forescout.com	Trust: 1.8
url:	https://www.forescout.com/resources/numberjack-weak-isn-generation-in-embedded-tcpip-stacks/	Trust: 1.8
url:	https://jvn.jp/vu/jvnvu90767599/	Trust: 0.8
url:	https://nvd.nist.gov/vuln/detail/cve-2020-27634	Trust: 0.8
url:	https://www.auscert.org.au/bulletins/esb-2021.0538	Trust: 0.6
url:	https://us-cert.cisa.gov/ics/advisories/icsa-21-042-01	Trust: 0.6

sources: JVNDB: JVNDB-2020-018055 // CNNVD: CNNVD-202102-1072 // NVD: CVE-2020-27634

CREDITS

and Amine Amri of Forescout Research Labs reported these vulnerabilities to CISA., Stanislav Dashevskyi,Daniel dos Santos, Jos Wetzels

Trust: 0.6

sources: CNNVD: CNNVD-202102-1072

SOURCES

db:	JVNDB	id:	JVNDB-2020-018055
db:	CNNVD	id:	CNNVD-202102-1072
db:	NVD	id:	CVE-2020-27634

LAST UPDATE DATE

2024-08-14T13:04:37.669000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2020-018055	date:	2023-12-25T03:08:00
db:	CNNVD	id:	CNNVD-202102-1072	date:	2022-04-29T00:00:00
db:	NVD	id:	CVE-2020-27634	date:	2023-10-13T15:12:30.383

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2020-018055	date:	2023-12-25T00:00:00
db:	CNNVD	id:	CNNVD-202102-1072	date:	2021-02-11T00:00:00
db:	NVD	id:	CVE-2020-27634	date:	2023-10-10T17:15:10.657