Details of VAR-202007-1257

ID

VAR-202007-1257

CVE

CVE-2020-9395

TITLE

plural Realtek Classic buffer overflow vulnerability in the product

Trust: 0.8

sources: JVNDB: JVNDB-2020-007682

DESCRIPTION

An issue was discovered on Realtek RTL8195AM, RTL8711AM, RTL8711AF, and RTL8710AF devices before 2.0.6. A stack-based buffer overflow exists in the client code that takes care of WPA2's 4-way-handshake via a malformed EAPOL-Key packet with a long keydata buffer. plural Realtek The product contains a classic buffer overflow vulnerability.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be put into a state. Realtek RTL8195AM, etc. are all an IoT microcontroller of Taiwan Realtek Semiconductor (Realtek). A buffer error vulnerability exists in many Realtek products. Remote attackers can use this vulnerability to execute arbitrary code on the system with the help of a specially crafted EAPOL-Key packet. The following products and versions are affected: Realtek RTL8195AM before 2.0.6; RTL8711AM before 2.0.6; RTL8711AF before 2.0.6; RTL8710AF before 2.0.6

Trust: 2.7

sources: NVD: CVE-2020-9395 // JVNDB: JVNDB-2020-007682 // CNVD: CNVD-2021-18235 // CNNVD: CNNVD-202007-279

IOT TAXONOMY

category:

['IoT']

sub_category:

Trust: 0.6

sources: CNVD: CNVD-2021-18235

AFFECTED PRODUCTS

vendor:	realtek	model:	rtl8710af	scope:	lt	version:	2.0.6	Trust: 1.6
vendor:	realtek	model:	rtl8711af	scope:	lt	version:	2.0.6	Trust: 1.6
vendor:	realtek	model:	rtl8711am	scope:	lt	version:	2.0.6	Trust: 1.6
vendor:	realtek	model:	rtl8195am	scope:	lt	version:	2.0.6	Trust: 1.6
vendor:	realtek semiconductor corp	model:	rtl8195am	scope:	eq	version:	2.0.6	Trust: 0.8
vendor:	realtek semiconductor corp	model:	rtl8710af	scope:	eq	version:	2.0.6	Trust: 0.8
vendor:	realtek semiconductor corp	model:	rtl8711af	scope:	eq	version:	2.0.6	Trust: 0.8
vendor:	realtek semiconductor corp	model:	rtl8711am	scope:	eq	version:	2.0.6	Trust: 0.8

sources: CNVD: CNVD-2021-18235 // JVNDB: JVNDB-2020-007682 // NVD: CVE-2020-9395

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-9395
value:	HIGH
Trust: 1.0
NVD:	JVNDB-2020-007682
value:	HIGH
Trust: 0.8
CNVD:	CNVD-2021-18235
value:	MEDIUM
Trust: 0.6
CNNVD:	CNNVD-202007-279
value:	HIGH
Trust: 0.6

nvd@nist.gov:	CVE-2020-9395
severity:	MEDIUM
baseScore:	4.9
vectorString:	AV:A/AC:M/AU:S/C:P/I:P/A:P
accessVector:	ADJACENT_NETWORK
accessComplexity:	MEDIUM
authentication:	SINGLE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	4.4
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.0
NVD:	JVNDB-2020-007682
severity:	MEDIUM
baseScore:	4.9
vectorString:	AV:A/AC:M/AU:S/C:P/I:P/A:P
accessVector:	ADJACENT NETWORK
accessComplexity:	MEDIUM
authentication:	SINGLE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	NONE
impactScore:	NONE
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.8
CNVD:	CNVD-2021-18235
severity:	MEDIUM
baseScore:	4.9
vectorString:	AV:A/AC:M/AU:S/C:P/I:P/A:P
accessVector:	ADJACENT_NETWORK
accessComplexity:	MEDIUM
authentication:	SINGLE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	PARTIAL
exploitabilityScore:	4.4
impactScore:	6.4
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.6

nvd@nist.gov:	CVE-2020-9395
baseSeverity:	HIGH
baseScore:	8.0
vectorString:	CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
attackVector:	ADJACENT
attackComplexity:	HIGH
privilegesRequired:	LOW
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	1.3
impactScore:	6.0
version:	3.1
Trust: 1.0
NVD:	JVNDB-2020-007682
baseSeverity:	HIGH
baseScore:	8.0
vectorString:	CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
attackVector:	ADJACENT NETWORK
attackComplexity:	HIGH
privilegesRequired:	LOW
userInteraction:	NONE
scope:	CHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: CNVD: CNVD-2021-18235 // JVNDB: JVNDB-2020-007682 // CNNVD: CNNVD-202007-279 // NVD: CVE-2020-9395

PROBLEMTYPE DATA

problemtype:	CWE-787	Trust: 1.0
problemtype:	CWE-120	Trust: 0.8

sources: JVNDB: JVNDB-2020-007682 // NVD: CVE-2020-9395

THREAT TYPE

remote or local

Trust: 0.6

sources: CNNVD: CNNVD-202007-279

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202007-279

CONFIGURATIONS

sources: JVNDB: JVNDB-2020-007682

PATCH

title:	Realtek IoT/Wi-Fi MCU Solutions	url:	https://www.amebaiot.com/en/security_bulletin/	Trust: 0.8
title:	Patch for Buffer overflow vulnerabilities in many Realtek products	url:	https://www.cnvd.org.cn/patchInfo/show/253426	Trust: 0.6
title:	Multiple Realtek Product Buffer Error Vulnerability Fix	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=124304	Trust: 0.6

sources: CNVD: CNVD-2021-18235 // JVNDB: JVNDB-2020-007682 // CNNVD: CNNVD-202007-279

EXTERNAL IDS

db:	NVD	id:	CVE-2020-9395	Trust: 3.0
db:	JVNDB	id:	JVNDB-2020-007682	Trust: 0.8
db:	CNVD	id:	CNVD-2021-18235	Trust: 0.6
db:	NSFOCUS	id:	47100	Trust: 0.6
db:	CNNVD	id:	CNNVD-202007-279	Trust: 0.6

sources: CNVD: CNVD-2021-18235 // JVNDB: JVNDB-2020-007682 // CNNVD: CNNVD-202007-279 // NVD: CVE-2020-9395

REFERENCES

url:	https://github.com/ambiot/amb1_arduino/commit/dcea55cf9775a0166805b3db845b237ecd5e74ea#diff-d06e7a87f34cc464a56799a419033014	Trust: 2.4
url:	https://github.com/ambiot/amb1_sdk/commit/bc5173d5d4faf6829074b0f1e1b242c12b7777a3#diff-700c216fb376666eaeda0c892e8bdc09	Trust: 2.4
url:	https://www.amebaiot.com/en/security_bulletin/	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2020-9395	Trust: 1.4
url:	https://www.amebaiot.com/en/arduino-faq/	Trust: 1.2
url:	https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2020-9395	Trust: 0.8
url:	http://www.nsfocus.net/vulndb/47100	Trust: 0.6

sources: CNVD: CNVD-2021-18235 // JVNDB: JVNDB-2020-007682 // CNNVD: CNNVD-202007-279 // NVD: CVE-2020-9395

SOURCES

db:	CNVD	id:	CNVD-2021-18235
db:	JVNDB	id:	JVNDB-2020-007682
db:	CNNVD	id:	CNNVD-202007-279
db:	NVD	id:	CVE-2020-9395

LAST UPDATE DATE

2024-11-23T21:35:25.790000+00:00

SOURCES UPDATE DATE

db:	CNVD	id:	CNVD-2021-18235	date:	2021-03-17T00:00:00
db:	JVNDB	id:	JVNDB-2020-007682	date:	2020-08-21T00:00:00
db:	CNNVD	id:	CNNVD-202007-279	date:	2020-07-30T00:00:00
db:	NVD	id:	CVE-2020-9395	date:	2024-11-21T05:40:33.507

SOURCES RELEASE DATE

db:	CNVD	id:	CNVD-2021-18235	date:	2021-03-17T00:00:00
db:	JVNDB	id:	JVNDB-2020-007682	date:	2020-08-21T00:00:00
db:	CNNVD	id:	CNNVD-202007-279	date:	2020-07-06T00:00:00
db:	NVD	id:	CVE-2020-9395	date:	2020-07-06T22:15:11.553