CVE-2020-3511

A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.

CVSS v3.0 7.4 HIGH
CVSS v2.0 6.1 MEDIUM

7.4^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 4.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

6.1^/10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 6.5 / Impact : 6.9

Access Vector ADJACENT_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-iosxe-isdn-q931-dos-67eUZBTf	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:cisco:ios_xe:15.1\(4\)m:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:asr1001-hx:-:::::::*
	cpe:2.3:h:cisco:asr1001-hx-rf:-:::::::*
	cpe:2.3:h:cisco:asr1001-x:-:::::::*
	cpe:2.3:h:cisco:asr1001-x-rf:-:::::::*
	cpe:2.3:h:cisco:asr1001-x-ws:-:::::::*
	cpe:2.3:h:cisco:asr1002-hx:-:::::::*
	cpe:2.3:h:cisco:asr1002-hx-rf:-:::::::*
	cpe:2.3:h:cisco:asr1002-hx-ws:-:::::::*
	cpe:2.3:h:cisco:asr1002-x:-:::::::*
	cpe:2.3:h:cisco:asr1002-x-rf:-:::::::*
	cpe:2.3:h:cisco:asr1002-x-ws:-:::::::*
	cpe:2.3:h:cisco:asr_1002:-:::::::*
	cpe:2.3:h:cisco:asr_1001:-:::::::*
	cpe:2.3:h:cisco:asr_1004:-:::::::*
	cpe:2.3:h:cisco:asr_1013:-:::::::*
	cpe:2.3:h:cisco:asr_1002-x:-:::::::*
	cpe:2.3:h:cisco:asr_1001-x:-:::::::*
	cpe:2.3:h:cisco:asr_1006:-:::::::*
	cpe:2.3:h:cisco:isr4321\/k9:-:::::::*
	cpe:2.3:h:cisco:isr4321\/k9-rf:-:::::::*
	cpe:2.3:h:cisco:isr4321\/k9-ws:-:::::::*
	cpe:2.3:h:cisco:isr4331\/k9:-:::::::*
	cpe:2.3:h:cisco:isr4331\/k9-rf:-:::::::*
	cpe:2.3:h:cisco:isr4331\/k9-ws:-:::::::*
	cpe:2.3:h:cisco:isr4351\/k9:-:::::::*
	cpe:2.3:h:cisco:csr1000v:-:::::::*
	cpe:2.3:h:cisco:asr_1000-x:-:::::::*
	cpe:2.3:h:cisco:isr1100-6g:-:::::::*
	cpe:2.3:h:cisco:isr1100-4g:-:::::::*
	cpe:2.3:h:cisco:isr1100-4gltena:-:::::::*
	cpe:2.3:h:cisco:isr1100-4gltegb:-:::::::*
	cpe:2.3:h:cisco:isr1100-lte:-:::::::*
	cpe:2.3:h:cisco:isr1100:-:::::::*
	cpe:2.3:h:cisco:isr4351\/k9-rf:-:::::::*
	cpe:2.3:h:cisco:isr4351\/k9-ws:-:::::::*
	cpe:2.3:h:cisco:isr_1111x-8p:-:::::::*
	cpe:2.3:h:cisco:isr_1100-8p:-:::::::*
	cpe:2.3:h:cisco:isr_1100-4p:-:::::::*
	cpe:2.3:h:cisco:isr_1101-4p:-:::::::*
	cpe:2.3:h:cisco:isr_1109-4p:-:::::::*
	cpe:2.3:h:cisco:isr_1109-2p:-:::::::*
	cpe:2.3:h:cisco:isr_4431:-:::::::*
	cpe:2.3:h:cisco:isr_4461:-:::::::*
	cpe:2.3:h:cisco:isr_1101:-:::::::*
	cpe:2.3:h:cisco:isr_1109:-:::::::*
	cpe:2.3:h:cisco:isr_111x:-:::::::*
	cpe:2.3:h:cisco:isr_1111x:-:::::::*
	cpe:2.3:h:cisco:isr_1120:-:::::::*
	cpe:2.3:h:cisco:isr_1160:-:::::::*
	cpe:2.3:h:cisco:isr_422:-:::::::*

Information

Published : 2020-09-24 11:15

Updated : 2020-10-08 07:07

NVD link : CVE-2020-3511

Mitre link : CVE-2020-3511

JSON object : View

CWE

CWE-20

Improper Input Validation

Products Affected

cisco

isr_4431
isr1100-4gltegb
asr1002-hx-rf
asr1001-x-ws
isr1100-4gltena
isr4321\/k9-ws
isr4331\/k9-ws
isr4331\/k9-rf
isr_1109-2p
asr1001-x
isr_422
isr_1111x-8p
asr1002-x
asr1002-hx-ws
asr_1002
isr4321\/k9-rf
isr_1100-8p
isr1100-6g
ios_xe
isr4351\/k9-ws
asr_1013
asr_1006
isr4351\/k9-rf
asr1002-x-ws
asr_1001
asr_1000-x
isr1100
isr_1109-4p
asr1002-x-rf
isr_1101-4p
csr1000v
asr1001-x-rf
isr_1100-4p
isr_111x
isr_1160
asr1001-hx
isr_1120
asr_1002-x
isr4351\/k9
isr1100-4g
isr_1109
isr1100-lte
isr_1111x
isr4321\/k9
asr1002-hx
asr1001-hx-rf
isr4331\/k9
asr_1001-x
asr_1004
isr_4461
isr_1101

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-isdn-q931-dos-67eUZBTf", "name": "20200924 Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability", "tags": ["Vendor Advisory"], "refsource": "CISCO"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-20"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2020-3511", "ASSIGNER": "psirt@cisco.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.1, "accessVector": "ADJACENT_NETWORK", "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 6.5, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/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": 2.8}}, "publishedDate": "2020-09-24T18:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:cisco:ios_xe:15.1\\(4\\)m:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:cisco:asr1001-hx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1001-hx-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1001-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1001-x-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1001-x-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-hx:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-hx-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-hx-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-x-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr1002-x-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1002:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1001:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1004:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1013:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1002-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1001-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1006:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4321\\/k9:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4321\\/k9-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4321\\/k9-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4331\\/k9:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4331\\/k9-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4331\\/k9-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4351\\/k9:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:csr1000v:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:asr_1000-x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100-6g:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100-4g:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100-4gltena:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100-4gltegb:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100-lte:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr1100:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4351\\/k9-rf:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr4351\\/k9-ws:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1111x-8p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1100-8p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1100-4p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1101-4p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1109-4p:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1109-2p:-:*:*:*:*:*:*:*", "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}, {"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_111x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1111x:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1120:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_1160:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:h:cisco:isr_422:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-10-08T14:07Z"}

7.4 /10

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

6.1 /10

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

JSON object

Attach tags to CVE-2020-3511

7.4^/10

6.1^/10

Attach tags to `CVE-2020-3511`