CVE-2020-27720

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.

CVSS v3 7.5 HIGH
CVSS v2.0 4.3 MEDIUM

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://support.f5.com/csp/article/K04048104	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:f5:big-ip_carrier-grade_nat::::::::
	cpe:2.3:a:f5:big-ip_carrier-grade_nat::::::::
	cpe:2.3:a:f5:big-ip_carrier-grade_nat::::::::
	cpe:2.3:a:f5:big-ip_carrier-grade_nat::::::::
	cpe:2.3:a:f5:big-ip_local_traffic_manager::::::::
	cpe:2.3:a:f5:big-ip_local_traffic_manager::::::::
	cpe:2.3:a:f5:big-ip_local_traffic_manager::::::::
	cpe:2.3:a:f5:big-ip_local_traffic_manager::::::::

History

28 Dec 2020, 17:25

Type	Values Removed	Values Added
CPE		cpe:2.3:a:f5:big-ip_local_traffic_manager:::::::: cpe:2.3:a:f5:big-ip_carrier-grade_nat::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 4.3 v3 : 7.5
CWE		NVD-CWE-noinfo
References	~~(MISC) https://support.f5.com/csp/article/K04048104 -~~	(MISC) https://support.f5.com/csp/article/K04048104 - Vendor Advisory

Information

Published : 2020-12-24 16:15

Updated : 2023-12-10 13:41

NVD link : CVE-2020-27720

Mitre link : CVE-2020-27720

CVE.ORG link : CVE-2020-27720

JSON object : View

Products Affected

f5

big-ip_carrier-grade_nat
big-ip_local_traffic_manager

CWE

NVD-CWE-noinfo

{"id": "CVE-2020-27720", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2020-12-24T16:15:15.087", "references": [{"url": "https://support.f5.com/csp/article/K04048104", "tags": ["Vendor Advisory"], "source": "f5sirt@f5.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En BIG-IP LTM/CGNAT versiones 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3 y 13.1.0-13.1.3.5, cuando se procesa el tr\u00e1fico NAT66 con Port Block Allocation (PBA) y SP-DAG habilitado, y dag-ipv6-prefix-len configurado con un valor menor que el predeterminado de 128, un patr\u00f3n de tr\u00e1fico no revelado puede causar que el Traffic Management Microkernel (TMM) se reinicie"}], "lastModified": "2020-12-28T17:25:44.860", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C3E1FBE0-03E5-4ED2-B7C3-849449ABDF2C", "versionEndIncluding": "13.1.3", "versionStartIncluding": "13.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F08EC455-D129-4B8F-B9D8-4A6E85B37217", "versionEndExcluding": "14.1.3.1", "versionStartIncluding": "14.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0993E30D-B0EB-4FC2-955D-2190291E08A7", "versionEndExcluding": "15.1.1", "versionStartIncluding": "15.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_carrier-grade_nat:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D951A221-BDA4-4E4D-8DE4-C4270916810A", "versionEndExcluding": "16.0.1", "versionStartIncluding": "16.0.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF552D91-612A-43E1-B2D6-02E2515FEA22", "versionEndIncluding": "13.1.3", "versionStartIncluding": "13.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B6D8C63D-D669-414C-8AF1-2F3A993D6B75", "versionEndExcluding": "14.1.3.1", "versionStartIncluding": "14.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FD2B708E-78D3-4016-9176-C364CBE20DA8", "versionEndExcluding": "15.1.1", "versionStartIncluding": "15.1.0"}, {"criteria": "cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4F9D19B2-1D89-4917-A82E-289EDE52C68F", "versionEndExcluding": "16.0.1", "versionStartIncluding": "16.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "f5sirt@f5.com"}