Details of VAR-202102-0806

ID

VAR-202102-0806

CVE

CVE-2021-22981

TITLE

BIG-IP Vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2021-003790

DESCRIPTION

On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated. BIG-IP Contains an unspecified vulnerability.Information may be obtained and information may be tampered with

Trust: 1.71

sources: NVD: CVE-2021-22981 // JVNDB: JVNDB-2021-003790 // VULHUB: VHN-381467

AFFECTED PRODUCTS

vendor:	f5	model:	big-ip application security manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip application acceleration manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip access policy manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip domain name system	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip application security manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip advanced web application firewall	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip global traffic manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip access policy manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip ddos hybrid defender	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip advanced web application firewall	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip global traffic manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip ddos hybrid defender	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip link controller	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip access policy manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip analytics	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip analytics	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip ddos hybrid defender	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip ddos hybrid defender	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip fraud protection service	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip policy enforcement manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip ssl orchestrator	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip fraud protection service	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip link controller	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip ssl orchestrator	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip link controller	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip policy enforcement manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip ssl orchestrator	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip advanced firewall manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip advanced firewall manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip application acceleration manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip analytics	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip application acceleration manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip ssl orchestrator	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip domain name system	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip analytics	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip fraud protection service	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip domain name system	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip policy enforcement manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip fraud protection service	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip advanced web application firewall	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip global traffic manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip policy enforcement manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip advanced web application firewall	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip advanced firewall manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip global traffic manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip application security manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip link controller	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip application security manager	scope:	gte	version:	12.1.0	Trust: 1.0
vendor:	f5	model:	big-ip advanced firewall manager	scope:	lte	version:	12.1.5	Trust: 1.0
vendor:	f5	model:	big-ip application acceleration manager	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip domain name system	scope:	lte	version:	11.6.5	Trust: 1.0
vendor:	f5	model:	big-ip access policy manager	scope:	gte	version:	11.6.1	Trust: 1.0
vendor:	f5	model:	big-ip application security manager	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip domain name system	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip ddos hybrid defender	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip fraud protection service	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip global traffic manager	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip analytics	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip application acceleration manager	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip advanced firewall manager	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip access policy manager	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip advanced web application firewall	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2021-003790 // NVD: CVE-2021-22981

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2021-22981
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2021-22981
value:	MEDIUM
Trust: 0.8
CNNVD:	CNNVD-202102-1054
value:	MEDIUM
Trust: 0.6
VULHUB:	VHN-381467
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2021-22981
severity:	MEDIUM
baseScore:	5.8
vectorString:	AV:N/AC:M/AU:N/C:P/I:P/A:N
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	NONE
exploitabilityScore:	8.6
impactScore:	4.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
VULHUB:	VHN-381467
severity:	MEDIUM
baseScore:	5.8
vectorString:	AV:N/AC:M/AU:N/C:P/I:P/A:N
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	PARTIAL
integrityImpact:	PARTIAL
availabilityImpact:	NONE
exploitabilityScore:	8.6
impactScore:	4.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.1

nvd@nist.gov:	CVE-2021-22981
baseSeverity:	MEDIUM
baseScore:	4.8
vectorString:	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	LOW
availabilityImpact:	NONE
exploitabilityScore:	2.2
impactScore:	2.5
version:	3.1
Trust: 1.0
NVD:	CVE-2021-22981
baseSeverity:	MEDIUM
baseScore:	4.8
vectorString:	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	LOW
integrityImpact:	LOW
availabilityImpact:	NONE
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: VULHUB: VHN-381467 // CNNVD: CNNVD-202102-1054 // JVNDB: JVNDB-2021-003790 // NVD: CVE-2021-22981

PROBLEMTYPE DATA

problemtype:	NVD-CWE-noinfo	Trust: 1.0
problemtype:	Lack of information (CWE-noinfo) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2021-003790 // NVD: CVE-2021-22981

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202102-1054

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202102-1054

PATCH

title:	K09121542	url:	https://support.f5.com/csp/article/K09121542	Trust: 0.8
title:	BIG-IP Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=142348	Trust: 0.6

sources: CNNVD: CNNVD-202102-1054 // JVNDB: JVNDB-2021-003790

EXTERNAL IDS

db:	NVD	id:	CVE-2021-22981	Trust: 2.5
db:	JVNDB	id:	JVNDB-2021-003790	Trust: 0.8
db:	AUSCERT	id:	ESB-2021.0499	Trust: 0.6
db:	CNNVD	id:	CNNVD-202102-1054	Trust: 0.6
db:	VULHUB	id:	VHN-381467	Trust: 0.1

sources: VULHUB: VHN-381467 // CNNVD: CNNVD-202102-1054 // JVNDB: JVNDB-2021-003790 // NVD: CVE-2021-22981

REFERENCES

url:	https://support.f5.com/csp/article/k09121542	Trust: 1.7
url:	https://nvd.nist.gov/vuln/detail/cve-2021-22981	Trust: 1.4
url:	https://vigilance.fr/vulnerability/f5-big-ip-man-in-the-middle-via-tls-master-secret-negotiation-34557	Trust: 0.6
url:	https://www.auscert.org.au/bulletins/esb-2021.0499	Trust: 0.6

sources: VULHUB: VHN-381467 // CNNVD: CNNVD-202102-1054 // JVNDB: JVNDB-2021-003790 // NVD: CVE-2021-22981

SOURCES

db:	VULHUB	id:	VHN-381467
db:	CNNVD	id:	CNNVD-202102-1054
db:	JVNDB	id:	JVNDB-2021-003790
db:	NVD	id:	CVE-2021-22981

LAST UPDATE DATE

2026-06-19T22:49:34.339000+00:00

SOURCES UPDATE DATE

db:	VULHUB	id:	VHN-381467	date:	2021-02-19T00:00:00
db:	CNNVD	id:	CNNVD-202102-1054	date:	2021-02-22T00:00:00
db:	JVNDB	id:	JVNDB-2021-003790	date:	2021-11-04T08:52:00
db:	NVD	id:	CVE-2021-22981	date:	2026-06-17T03:38:08.890

SOURCES RELEASE DATE

db:	VULHUB	id:	VHN-381467	date:	2021-02-12T00:00:00
db:	CNNVD	id:	CNNVD-202102-1054	date:	2021-02-11T00:00:00
db:	JVNDB	id:	JVNDB-2021-003790	date:	2021-11-04T00:00:00
db:	NVD	id:	CVE-2021-22981	date:	2021-02-12T18:15:12.797