CVE-2022-20623

A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic.

CVSS v3.0 7.5 HIGH
CVSS v2.0 7.1 HIGH

7.5^/10

CVSS v3.0 : HIGH

V3 Legend

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

7.1^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 8.6 / Impact : 6.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-bfd-dos-wGQXrzxn	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:n9k-c92160yc-x:-:::::::*
	cpe:2.3:h:cisco:n9k-c92300yc:-:::::::*
	cpe:2.3:h:cisco:n9k-c92304qc:-:::::::*
	cpe:2.3:h:cisco:n9k-c9232c:-:::::::*
	cpe:2.3:h:cisco:n9k-c92348gc-x:-:::::::*
	cpe:2.3:h:cisco:n9k-c9236c:-:::::::*
	cpe:2.3:h:cisco:n9k-c9272q:-:::::::*
	cpe:2.3:h:cisco:n9k-c93108tc-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-c93108tc-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-c9316d-gx:-:::::::*
	cpe:2.3:h:cisco:n9k-c93180lc-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-c93180yc-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-c93180yc-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-c93180yc2-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-c93216tc-fx2:-:::::::*
	cpe:2.3:h:cisco:n9k-c93240yc-fx2:-:::::::*
	cpe:2.3:h:cisco:n9k-c9332c:-:::::::*
	cpe:2.3:h:cisco:n9k-c93360yc-fx2:-:::::::*
	cpe:2.3:h:cisco:n9k-c9336c-fx2:-:::::::*
	cpe:2.3:h:cisco:n9k-c9348gc-fxp:-:::::::*
	cpe:2.3:h:cisco:n9k-c93600cd-gx:-:::::::*
	cpe:2.3:h:cisco:n9k-c9364c:-:::::::*
	cpe:2.3:h:cisco:n9k-c9364c-gx:-:::::::*

Configuration 2 (hide)

AND

OR	cpe:2.3:o:cisco:nx-os::::::::
	cpe:2.3:o:cisco:nx-os::::::::

OR	cpe:2.3:h:cisco:n9k-x97160yc-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-x97284yc-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-x9732c-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-x9732c-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-x9736c-ex:-:::::::*
	cpe:2.3:h:cisco:n9k-x9736c-fx:-:::::::*
	cpe:2.3:h:cisco:n9k-x9788tc-fx:-:::::::*

Information

Published : 2022-02-23 10:15

Updated : 2022-03-02 07:37

NVD link : CVE-2022-20623

Mitre link : CVE-2022-20623

JSON object : View

CWE

NVD-CWE-Other

Products Affected

cisco

n9k-c92160yc-x
n9k-x9788tc-fx
n9k-c9232c
n9k-c9348gc-fxp
n9k-c93600cd-gx
n9k-x97284yc-fx
n9k-c92304qc
n9k-x9732c-fx
n9k-c9236c
n9k-c93180yc2-fx
n9k-c93108tc-ex
n9k-c93240yc-fx2
n9k-c9332c
n9k-x9732c-ex
n9k-c92300yc
n9k-c9336c-fx2
n9k-x9736c-fx
n9k-c92348gc-x
n9k-x97160yc-ex
n9k-c93180lc-ex
n9k-c9272q
n9k-c93180yc-fx
nx-os
n9k-c9364c
n9k-c93180yc-ex
n9k-c9316d-gx
n9k-c93360yc-fx2
n9k-c93108tc-fx
n9k-c93216tc-fx2
n9k-c9364c-gx
n9k-x9736c-ex

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-bfd-dos-wGQXrzxn", "name": "20220223 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability", "tags": ["Vendor Advisory"], "refsource": "CISCO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-20623", "ASSIGNER": "psirt@cisco.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.1, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2022-02-23T18:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "7.0\\(3\\)i7\\(3\\)", "versionStartIncluding": "7.0\\(3\\)i6\\(2\\)"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:n9k-c92160yc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c92300yc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c92304qc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9232c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c92348gc-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9236c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9272q:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93108tc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93108tc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9316d-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93180lc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93180yc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93180yc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93180yc2-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93216tc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93240yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9332c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93360yc-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9336c-fx2:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9348gc-fxp:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c93600cd-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9364c:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-c9364c-gx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "9.3\\(8\\)", "versionStartIncluding": "7.0\\(3\\)i6\\(2\\)"}, {"cpe23Uri": "cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "10.2\\(1\\)", "versionStartIncluding": "10.1\\(1\\)"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:n9k-x97160yc-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x97284yc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x9732c-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x9732c-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x9736c-ex:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x9736c-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:n9k-x9788tc-fx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-03-02T15:37Z"}

7.5 /10

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

7.1 /10

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

JSON object

Attach tags to CVE-2022-20623

7.5^/10

7.1^/10

Attach tags to `CVE-2022-20623`