CVE-2022-20678

A vulnerability in the AppNav-XE feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of certain TCP segments. An attacker could exploit this vulnerability by sending a stream of crafted TCP traffic at a high rate through an interface of an affected device. That interface would need to have AppNav interception enabled. A successful exploit could allow the attacker to cause the device to reload.

CVSS v3.0 7.5 HIGH
CVSS v2.0 7.8 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

7.8^/10

CVSS v2.0 : HIGH

V2 Legend

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

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

OR	cpe:2.3:o:cisco:ios_xe:16.9.6:::::::*
	cpe:2.3:o:cisco:ios_xe:16.12.4:::::::*
	cpe:2.3:o:cisco:ios_xe:16.12.5:::::::*
	cpe:2.3:o:cisco:ios_xe:17.3.3:::::::*

OR	cpe:2.3:a:cisco:catalyst_8000v_edge:-:::::::*
	cpe:2.3:a:cisco:cloud_services_router_1000v:-:::::::*
	cpe:2.3:h:cisco:asr_1001-x:-:::::::*
	cpe:2.3:h:cisco:asr_1002-x:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-1n1s-4t2x:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-1n1s-6t:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-2n2s-4t2x:-:::::::*
	cpe:2.3:h:cisco:catalyst_8300-2n2s-6t:-:::::::*
	cpe:2.3:h:cisco:catalyst_8500:-:::::::*
	cpe:2.3:h:cisco:catalyst_8500-4qc:-:::::::*
	cpe:2.3:h:cisco:catalyst_8500l:-:::::::*
	cpe:2.3:h:cisco:isr_1100-4g:-:::::::*
	cpe:2.3:h:cisco:isr_1100-6g:-:::::::*
	cpe:2.3:h:cisco:isr_1101:-:::::::*
	cpe:2.3:h:cisco:isr_1109:-:::::::*
	cpe:2.3:h:cisco:isr_1111x:-:::::::*
	cpe:2.3:h:cisco:isr_111x:-:::::::*
	cpe:2.3:h:cisco:isr_1120:-:::::::*
	cpe:2.3:h:cisco:isr_1131:-:::::::*
	cpe:2.3:h:cisco:isr_1160:-:::::::*
	cpe:2.3:h:cisco:isr_4221:-:::::::*
	cpe:2.3:h:cisco:isr_4331:-:::::::*
	cpe:2.3:h:cisco:isr_4431:-:::::::*
	cpe:2.3:h:cisco:isr_4461:-:::::::*

Information

Published : 2022-04-15 08:15

Updated : 2022-04-25 08:28

NVD link : CVE-2022-20678

Mitre link : CVE-2022-20678

JSON object : View

CWE

CWE-755

Improper Handling of Exceptional Conditions

Products Affected

cisco

catalyst_8500l
isr_4431
catalyst_8300-1n1s-6t
catalyst_8300-2n2s-6t
isr_1100-4g
ios_xe
catalyst_8500-4qc
catalyst_8300-1n1s-4t2x
isr_4221
catalyst_8500
isr_111x
isr_1160
isr_1120
isr_4331
isr_1100-6g
asr_1002-x
cloud_services_router_1000v
isr_1109
isr_1111x
isr_1131
catalyst_8300-2n2s-4t2x
asr_1001-x
isr_4461
isr_1101
catalyst_8000v_edge

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4", "name": "20220413 Cisco IOS XE Software AppNav-XE Denial of Service Vulnerability", "tags": ["Vendor Advisory"], "refsource": "CISCO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the AppNav-XE feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of certain TCP segments. An attacker could exploit this vulnerability by sending a stream of crafted TCP traffic at a high rate through an interface of an affected device. That interface would need to have AppNav interception enabled. A successful exploit could allow the attacker to cause the device to reload."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-755"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2022-20678", "ASSIGNER": "psirt@cisco.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "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": "2022-04-15T15:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:ios_xe:16.9.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:cisco:ios_xe:16.12.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:cisco:ios_xe:16.12.5:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:cisco:ios_xe:17.3.3:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:cisco:catalyst_8000v_edge:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:a:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8300-1n1s-4t2x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8300-1n1s-6t:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8300-2n2s-4t2x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8300-2n2s-6t:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8500:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8500-4qc:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:catalyst_8500l:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1100-4g:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1100-6g:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1101:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1109:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1111x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_111x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1120:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1131:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1160:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_4221:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_4461:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-04-25T15:28Z"}

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

7.8 /10

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

JSON object

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