Details of VAR-202012-0727

ID

VAR-202012-0727

CVE

CVE-2020-27720

TITLE

F5 Networks of BIG-IP Carrier-Grade Network Address Translation (CGNAT) and BIG-IP Local Traffic Manager (LTM) Vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2020-018310

DESCRIPTION

On BIG-IP LTM/CGNAT version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, and 13.1.0-13.1.3.5, when processing NAT66 traffic with Port Block Allocation (PBA) mode and SP-DAG enabled, and dag-ipv6-prefix-len configured with a value less than the default of 128, an undisclosed traffic pattern may cause the Traffic Management Microkernel (TMM) to restart. F5 Networks of BIG-IP Carrier-Grade Network Address Translation (CGNAT) and BIG-IP Local Traffic Manager (LTM) Exists in unspecified vulnerabilities.Service operation interruption (DoS) It may be in a state. F5 BIG-IP is an application delivery platform integrated with network traffic management, application security management, load balancing and other functions of the US company F5. There is a security vulnerability in F5 BIG-IP LTM/CGNAT, which can be exploited by an attacker to trigger a fatal error through NAT66 of F5 BIG-IP LTM CGNAT to trigger a denial of service

Trust: 1.71

sources: NVD: CVE-2020-27720 // JVNDB: JVNDB-2020-018310 // VULHUB: VHN-371831

AFFECTED PRODUCTS

vendor:	f5	model:	big-ip carrier-grade nat	scope:	gte	version:	14.1.0	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	lt	version:	15.1.1	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	16.0.0	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	13.1.0	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	gte	version:	15.1.0	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	lt	version:	16.0.1	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lte	version:	13.1.3	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lt	version:	14.1.3.1	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	lt	version:	14.1.3.1	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	14.1.0	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lt	version:	16.0.1	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	gte	version:	16.0.0	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	gte	version:	15.1.0	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	gte	version:	13.1.0	Trust: 1.0
vendor:	f5	model:	big-ip local traffic manager	scope:	lt	version:	15.1.1	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade nat	scope:	lte	version:	13.1.3	Trust: 1.0
vendor:	f5	model:	big-ip carrier-grade network address translation	scope:	-	version:	-	Trust: 0.8
vendor:	f5	model:	big-ip local traffic manager	scope:	eq	version:	15.1.0 that's all 15.1.1	Trust: 0.8
vendor:	f5	model:	big-ip local traffic manager	scope:	eq	version:	16.0.0 that's all 16.0.1	Trust: 0.8
vendor:	f5	model:	big-ip local traffic manager	scope:	eq	version:	13.1.0 to 13.1.3	Trust: 0.8
vendor:	f5	model:	big-ip local traffic manager	scope:	eq	version:	14.1.0 that's all 14.1.3.1	Trust: 0.8

sources: JVNDB: JVNDB-2020-018310 // NVD: CVE-2020-27720

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-27720
value:	HIGH
Trust: 1.0
NVD:	CVE-2020-27720
value:	HIGH
Trust: 0.8
CNNVD:	CNNVD-202012-1278
value:	HIGH
Trust: 0.6
VULHUB:	VHN-371831
value:	MEDIUM
Trust: 0.1

nvd@nist.gov:	CVE-2020-27720
severity:	MEDIUM
baseScore:	4.3
vectorString:	AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	8.6
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8
VULHUB:	VHN-371831
severity:	MEDIUM
baseScore:	4.3
vectorString:	AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	MEDIUM
authentication:	NONE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	8.6
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 0.1

nvd@nist.gov:	CVE-2020-27720
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	3.9
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2020-27720
baseSeverity:	HIGH
baseScore:	7.5
vectorString:	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	NONE
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: VULHUB: VHN-371831 // JVNDB: JVNDB-2020-018310 // CNNVD: CNNVD-202012-1278 // NVD: CVE-2020-27720

PROBLEMTYPE DATA

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

sources: JVNDB: JVNDB-2020-018310 // NVD: CVE-2020-27720

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202012-1278

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202012-1278

PATCH

title:	K04048104	url:	https://my.f5.com/manage/s/article/K04048104	Trust: 0.8
title:	F5 BIG-IP LTM/CGNAT Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=137965	Trust: 0.6

sources: JVNDB: JVNDB-2020-018310 // CNNVD: CNNVD-202012-1278

EXTERNAL IDS

db:	NVD	id:	CVE-2020-27720	Trust: 3.3
db:	JVNDB	id:	JVNDB-2020-018310	Trust: 0.8
db:	CNNVD	id:	CNNVD-202012-1278	Trust: 0.7
db:	AUSCERT	id:	ESB-2020.4491	Trust: 0.6
db:	VULHUB	id:	VHN-371831	Trust: 0.1

sources: VULHUB: VHN-371831 // JVNDB: JVNDB-2020-018310 // CNNVD: CNNVD-202012-1278 // NVD: CVE-2020-27720

REFERENCES

url:	https://support.f5.com/csp/article/k04048104	Trust: 1.7
url:	https://nvd.nist.gov/vuln/detail/cve-2020-27720	Trust: 1.4
url:	https://www.auscert.org.au/bulletins/esb-2020.4491/	Trust: 0.6
url:	https://vigilance.fr/vulnerability/f5-big-ip-ltm-cgnat-denial-of-service-via-nat66-34142	Trust: 0.6

sources: VULHUB: VHN-371831 // JVNDB: JVNDB-2020-018310 // CNNVD: CNNVD-202012-1278 // NVD: CVE-2020-27720

SOURCES

db:	VULHUB	id:	VHN-371831
db:	JVNDB	id:	JVNDB-2020-018310
db:	CNNVD	id:	CNNVD-202012-1278
db:	NVD	id:	CVE-2020-27720

LAST UPDATE DATE

2024-11-23T22:33:14.536000+00:00

SOURCES UPDATE DATE

db:	VULHUB	id:	VHN-371831	date:	2020-12-28T00:00:00
db:	JVNDB	id:	JVNDB-2020-018310	date:	2024-07-19T01:59:00
db:	CNNVD	id:	CNNVD-202012-1278	date:	2021-01-05T00:00:00
db:	NVD	id:	CVE-2020-27720	date:	2024-11-21T05:21:41.590

SOURCES RELEASE DATE

db:	VULHUB	id:	VHN-371831	date:	2020-12-24T00:00:00
db:	JVNDB	id:	JVNDB-2020-018310	date:	2024-07-19T00:00:00
db:	CNNVD	id:	CNNVD-202012-1278	date:	2020-12-17T00:00:00
db:	NVD	id:	CVE-2020-27720	date:	2020-12-24T16:15:15.087