Details of VAR-202103-0945

ID

VAR-202103-0945

CVE

CVE-2021-27254

TITLE

NETGEAR R7800 Vulnerability in using hard-coded passwords in

Trust: 0.8

sources: JVNDB: JVNDB-2021-004434

DESCRIPTION

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability. The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability to execute arbitrary code in the context of root. Was ZDI-CAN-12287. Zero Day Initiative To this vulnerability ZDI-CAN-12287 Was numbered.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state

Trust: 2.25

sources: NVD: CVE-2021-27254 // JVNDB: JVNDB-2021-004434 // ZDI: ZDI-21-252

AFFECTED PRODUCTS

vendor:	netgear	model:	rbk53	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	r9000	scope:	lt	version:	1.0.5.28	Trust: 1.0
vendor:	netgear	model:	ex6250	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	r7800	scope:	lt	version:	1.0.2.80	Trust: 1.0
vendor:	netgear	model:	rbr20	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	r8900	scope:	lt	version:	1.0.5.28	Trust: 1.0
vendor:	netgear	model:	rbk20	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	rbk40	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	ex6400	scope:	lt	version:	1.0.2.158	Trust: 1.0
vendor:	netgear	model:	rbs50	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	rbs10	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	rbk12	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	rbs40	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	d7800	scope:	lt	version:	1.0.1.60	Trust: 1.0
vendor:	netgear	model:	ex6420	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	ex7300	scope:	lt	version:	1.0.2.158	Trust: 1.0
vendor:	netgear	model:	ex6400v2	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	ex7320	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	rbr50	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	rbk13	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	rbk23	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	br200	scope:	lt	version:	5.10.0.5	Trust: 1.0
vendor:	netgear	model:	rbk44	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	xr500	scope:	lt	version:	2.3.2.114	Trust: 1.0
vendor:	netgear	model:	lbr20	scope:	lt	version:	2.6.3.50	Trust: 1.0
vendor:	netgear	model:	ex6150v2	scope:	lt	version:	1.0.1.98	Trust: 1.0
vendor:	netgear	model:	rbs20	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	ex6410	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	rbs50y	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	rbk50	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	xr450	scope:	lt	version:	2.3.2.114	Trust: 1.0
vendor:	netgear	model:	br500	scope:	lt	version:	5.10.0.5	Trust: 1.0
vendor:	netgear	model:	rbk14	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	netgear	model:	ex7300v2	scope:	lt	version:	1.0.0.134	Trust: 1.0
vendor:	netgear	model:	xr700	scope:	lt	version:	1.0.1.38	Trust: 1.0
vendor:	netgear	model:	rbr40	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	ex6100v2	scope:	lt	version:	1.0.1.98	Trust: 1.0
vendor:	netgear	model:	rbk43	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	ex7700	scope:	lt	version:	1.0.0.216	Trust: 1.0
vendor:	netgear	model:	rbr10	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	rbk43s	scope:	lt	version:	2.6.2.104	Trust: 1.0
vendor:	netgear	model:	ex8000	scope:	lt	version:	1.0.1.232	Trust: 1.0
vendor:	netgear	model:	rbk15	scope:	lt	version:	2.7.2.104	Trust: 1.0
vendor:	ネットギア	model:	ex6150v2	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6400v2	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6100v2	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	d7800	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	br200	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6250	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6420	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6410	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	ex6400	scope:	-	version:	-	Trust: 0.8
vendor:	ネットギア	model:	br500	scope:	-	version:	-	Trust: 0.8
vendor:	netgear	model:	r7800	scope:	-	version:	-	Trust: 0.7

sources: ZDI: ZDI-21-252 // JVNDB: JVNDB-2021-004434 // NVD: CVE-2021-27254

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-27254
value:	HIGH
Trust: 1.0
zdi-disclosures@trendmicro.com:	CVE-2021-27254
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2021-27254
value:	HIGH
Trust: 0.8
ZDI:	CVE-2021-27254
value:	MEDIUM
Trust: 0.7
CNNVD:	CNNVD-202102-1677
value:	HIGH
Trust: 0.6

nvd@nist.gov:	CVE-2021-27254
severity:	HIGH
baseScore:	8.3
vectorString:	AV:A/AC:L/AU:N/C:C/I:C/A:C
accessVector:	ADJACENT_NETWORK
accessComplexity:	LOW
authentication:	NONE
confidentialityImpact:	COMPLETE
integrityImpact:	COMPLETE
availabilityImpact:	COMPLETE
exploitabilityScore:	6.5
impactScore:	10.0
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8

nvd@nist.gov:	CVE-2021-27254
baseSeverity:	HIGH
baseScore:	8.8
vectorString:	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	HIGH
integrityImpact:	HIGH
availabilityImpact:	HIGH
exploitabilityScore:	2.8
impactScore:	5.9
version:	3.1
Trust: 1.0
zdi-disclosures@trendmicro.com:	CVE-2021-27254
baseSeverity:	MEDIUM
baseScore:	6.3
vectorString:	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	LOW
availabilityImpact:	LOW
exploitabilityScore:	2.8
impactScore:	3.4
version:	3.0
Trust: 1.0
NVD:	CVE-2021-27254
baseSeverity:	HIGH
baseScore:	8.8
vectorString:	CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
attackVector:	ADJACENT 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
ZDI:	CVE-2021-27254
baseSeverity:	MEDIUM
baseScore:	6.3
vectorString:	AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
attackVector:	ADJACENT
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	LOW
availabilityImpact:	LOW
exploitabilityScore:	2.8
impactScore:	3.4
version:	3.0
Trust: 0.7

sources: ZDI: ZDI-21-252 // JVNDB: JVNDB-2021-004434 // CNNVD: CNNVD-202102-1677 // NVD: CVE-2021-27254 // NVD: CVE-2021-27254

PROBLEMTYPE DATA

problemtype:	CWE-798	Trust: 1.0
problemtype:	CWE-259	Trust: 1.0
problemtype:	Use hard-coded passwords (CWE-259) [ Other ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-004434 // NVD: CVE-2021-27254

THREAT TYPE

remote or local

Trust: 0.6

sources: CNNVD: CNNVD-202102-1677

TYPE

trust management problem

Trust: 0.6

sources: CNNVD: CNNVD-202102-1677

PATCH

title:	Security Advisory for Multiple Vulnerabilities on Some Routers, Satellites, and Extenders	url:	https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders	Trust: 1.5
title:	NETGEAR Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=142759	Trust: 0.6

sources: ZDI: ZDI-21-252 // JVNDB: JVNDB-2021-004434 // CNNVD: CNNVD-202102-1677

EXTERNAL IDS

db:	NVD	id:	CVE-2021-27254	Trust: 3.1
db:	ZDI	id:	ZDI-21-252	Trust: 3.1
db:	JVNDB	id:	JVNDB-2021-004434	Trust: 0.8
db:	ZDI_CAN	id:	ZDI-CAN-12287	Trust: 0.7
db:	CNNVD	id:	CNNVD-202102-1677	Trust: 0.6

sources: ZDI: ZDI-21-252 // JVNDB: JVNDB-2021-004434 // CNNVD: CNNVD-202102-1677 // NVD: CVE-2021-27254

REFERENCES

url:	https://www.zerodayinitiative.com/advisories/zdi-21-252/	Trust: 3.0
url:	https://kb.netgear.com/000062883/security-advisory-for-multiple-vulnerabilities-on-some-routers-satellites-and-extenders	Trust: 2.3
url:	https://nvd.nist.gov/vuln/detail/cve-2021-27254	Trust: 1.4

sources: ZDI: ZDI-21-252 // JVNDB: JVNDB-2021-004434 // CNNVD: CNNVD-202102-1677 // NVD: CVE-2021-27254

CREDITS

84c0

Trust: 0.7

sources: ZDI: ZDI-21-252

SOURCES

db:	ZDI	id:	ZDI-21-252
db:	JVNDB	id:	JVNDB-2021-004434
db:	CNNVD	id:	CNNVD-202102-1677
db:	NVD	id:	CVE-2021-27254

LAST UPDATE DATE

2024-11-23T22:20:50.647000+00:00

SOURCES UPDATE DATE

db:	ZDI	id:	ZDI-21-252	date:	2021-02-25T00:00:00
db:	JVNDB	id:	JVNDB-2021-004434	date:	2021-11-22T06:02:00
db:	CNNVD	id:	CNNVD-202102-1677	date:	2022-04-26T00:00:00
db:	NVD	id:	CVE-2021-27254	date:	2024-11-21T05:57:41.790

SOURCES RELEASE DATE

db:	ZDI	id:	ZDI-21-252	date:	2021-02-25T00:00:00
db:	JVNDB	id:	JVNDB-2021-004434	date:	2021-11-22T00:00:00
db:	CNNVD	id:	CNNVD-202102-1677	date:	2021-02-25T00:00:00
db:	NVD	id:	CVE-2021-27254	date:	2021-03-05T20:15:12.317