CVE-2021-1586

A vulnerability in the Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to unexpectedly restart the device, resulting in a denial of service (DoS) condition. This vulnerability exists because TCP traffic sent to a specific port on an affected device is not properly sanitized. An attacker could exploit this vulnerability by sending crafted TCP data to a specific port that is listening on a public-facing IP address for the Multi-Pod or Multi-Site configuration. A successful exploit could allow the attacker to cause the device to restart unexpectedly, resulting in a DoS condition.

CVSS v3.0 8.6 HIGH
CVSS v2.0 5.0 MEDIUM

8.6^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

5.0^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:nx-os:15.0\(2e\):::::::*
	cpe:2.3:o:cisco:nx-os:15.1\(1h\):::::::*

OR	cpe:2.3:h:cisco:nexus_9000v:-:::::::*
	cpe:2.3:h:cisco:nexus_92160yc-x:-:::::::*
	cpe:2.3:h:cisco:nexus_92300yc:-:::::::*
	cpe:2.3:h:cisco:nexus_92304qc:-:::::::*
	cpe:2.3:h:cisco:nexus_92348gc-x:-:::::::*
	cpe:2.3:h:cisco:nexus_9236c:-:::::::*
	cpe:2.3:h:cisco:nexus_9272q:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-ex-24:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-fx-24:-:::::::*
	cpe:2.3:h:cisco:nexus_93108tc-fx3p:-:::::::*
	cpe:2.3:h:cisco:nexus_93120tx:-:::::::*
	cpe:2.3:h:cisco:nexus_93128tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9316d-gx:-:::::::*
	cpe:2.3:h:cisco:nexus_93180lc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-ex-24:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-fx-24:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-fx3:-:::::::*
	cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:::::::*
	cpe:2.3:h:cisco:nexus_93216tc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_9332c:-:::::::*
	cpe:2.3:h:cisco:nexus_9332pq:-:::::::*
	cpe:2.3:h:cisco:nexus_93360yc-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::*
	cpe:2.3:h:cisco:nexus_9336c-fx2-e:-:::::::*
	cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::*
	cpe:2.3:h:cisco:nexus_93600cd-gx:-:::::::*
	cpe:2.3:h:cisco:nexus_9364c:-:::::::*
	cpe:2.3:h:cisco:nexus_9364c-gx:-:::::::*
	cpe:2.3:h:cisco:nexus_9372px:-:::::::*
	cpe:2.3:h:cisco:nexus_9372px-e:-:::::::*
	cpe:2.3:h:cisco:nexus_9372tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9372tx-e:-:::::::*
	cpe:2.3:h:cisco:nexus_9396px:-:::::::*
	cpe:2.3:h:cisco:nexus_9396tx:-:::::::*
	cpe:2.3:h:cisco:nexus_9508:-:::::::*

Information

Published : 2021-08-25 13:15

Updated : 2021-09-02 10:18

NVD link : CVE-2021-1586

Mitre link : CVE-2021-1586

JSON object : View

CWE

CWE-345

Insufficient Verification of Data Authenticity

Products Affected

cisco

nexus_9372tx-e
nexus_9236c
nexus_9372px
nexus_9396tx
nexus_93108tc-ex
nexus_9336c-fx2
nexus_93240yc-fx2
nexus_93108tc-fx
nexus_93180yc-fx3s
nexus_93180yc-fx-24
nexus_92348gc-x
nexus_93120tx
nexus_93216tc-fx2
nexus_9372px-e
nexus_93180lc-ex
nexus_93108tc-ex-24
nexus_93108tc-fx-24
nexus_93360yc-fx2
nexus_93180yc-ex
nexus_93180yc-fx3
nexus_9336c-fx2-e
nexus_92160yc-x
nexus_93600cd-gx
nexus_9364c
nexus_92300yc
nexus_9272q
nexus_93128tx
nexus_9372tx
nexus_93180yc-fx
nexus_9332c
nexus_93180yc-ex-24
nx-os
nexus_9316d-gx
nexus_9332pq
nexus_9396px
nexus_93108tc-fx3p
nexus_9000v
nexus_92304qc
nexus_9348gc-fxp
nexus_9508
nexus_9364c-gx

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n9kaci-tcp-dos-YXukt6gM", "name": "20210825 Cisco Nexus 9000 Series Fabric Switches ACI Mode Multi-Pod and Multi-Site TCP Denial of Service Vulnerability", "tags": ["Patch", "Vendor Advisory"], "refsource": "CISCO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the Multi-Pod or Multi-Site network configurations for Cisco Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to unexpectedly restart the device, resulting in a denial of service (DoS) condition. This vulnerability exists because TCP traffic sent to a specific port on an affected device is not properly sanitized. An attacker could exploit this vulnerability by sending crafted TCP data to a specific port that is listening on a public-facing IP address for the Multi-Pod or Multi-Site configuration. A successful exploit could allow the attacker to cause the device to restart unexpectedly, resulting in a DoS condition."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-345"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-1586", "ASSIGNER": "psirt@cisco.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 5.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 2.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 3.9}}, "publishedDate": "2021-08-25T20:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:15.0\\(2e\\):*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:15.1\\(1h\\):*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:nexus_9000v:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92160yc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92300yc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92304qc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_92348gc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9236c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9272q:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-ex-24:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-fx-24:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93108tc-fx3p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93120tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93128tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9316d-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180lc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-ex-24:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-fx-24:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-fx3:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93180yc-fx3s:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93216tc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93240yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9332c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9332pq:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93360yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9336c-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9336c-fx2-e:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9348gc-fxp:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_93600cd-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9364c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9364c-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372px:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372px-e:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9372tx-e:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9396px:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9396tx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:nexus_9508:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-09-02T17:18Z"}

8.6 /10

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

5.0 /10

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

JSON object

Attach tags to CVE-2021-1586

8.6^/10

5.0^/10

Attach tags to `CVE-2021-1586`