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[email protected]NVD:CVE-2020-3511

HistorySep 24, 2020 - 6:15 p.m.

CVE-2020-3511

2020-09-2418:15:21

CWE-20

[email protected]

web.nvd.nist.gov

cisco

isdn

vulnerability

denial of service

input validation

q.931 messages

CVSS2

6.1

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS

0.001

Percentile

25.0%

JSON

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.

Affected configurations

Nvd

Node

ciscoios_xeMatch15.1\(4\)m

AND

cisco1100-4g_integrated_services_routerMatch-

cisco1100-4gltegb_integrated_services_routerMatch-

cisco1100-4gltena_integrated_services_routerMatch-

cisco1100-4p_integrated_services_routerMatch-

cisco1100-6g_integrated_services_routerMatch-

cisco1100-8p_integrated_services_routerMatch-

cisco1100-lte_integrated_services_routerMatch-

cisco1100_integrated_services_routerMatch-

cisco1101-4p_integrated_services_routerMatch-

cisco1101_integrated_services_routerMatch-

cisco1109-2p_integrated_services_routerMatch-

cisco1109-4p_integrated_services_routerMatch-

cisco1109_integrated_services_routerMatch-

cisco1111x-8p_integrated_services_routerMatch-

cisco1111x_integrated_services_routerMatch-

cisco111x_integrated_services_routerMatch-

cisco1120_integrated_services_routerMatch-

cisco1160_integrated_services_routerMatch-

cisco422_integrated_services_routerMatch-

cisco4321\/k9-rf_integrated_services_routerMatch-

cisco4321\/k9-ws_integrated_services_routerMatch-

cisco4321\/k9_integrated_services_routerMatch-

cisco4331\/k9-rf_integrated_services_routerMatch-

cisco4331\/k9-ws_integrated_services_routerMatch-

cisco4331\/k9_integrated_services_routerMatch-

cisco4351\/k9-rf_integrated_services_routerMatch-

cisco4351\/k9-ws_integrated_services_routerMatch-

cisco4351\/k9_integrated_services_routerMatch-

cisco4431_integrated_services_routerMatch-

cisco4461_integrated_services_routerMatch-

ciscoasr_1000-xMatch-

ciscoasr_1001Match-

ciscoasr_1001-xMatch-

ciscoasr_1002Match-

ciscoasr_1002-xMatch-

ciscoasr_1004Match-

ciscoasr_1006Match-

ciscoasr_1013Match-

ciscoasr1001-hxMatch-

ciscoasr1001-hx-rfMatch-

ciscoasr1001-xMatch-

ciscoasr1001-x-rfMatch-

ciscoasr1001-x-wsMatch-

ciscoasr1002-hxMatch-

ciscoasr1002-hx-rfMatch-

ciscoasr1002-hx-wsMatch-

ciscoasr1002-xMatch-

ciscoasr1002-x-rfMatch-

ciscoasr1002-x-wsMatch-

ciscocsr1000vMatch-

VendorProductVersionCPE
ciscoios_xe15.1(4)mcpe:2.3:o:cisco:ios_xe:15.1\(4\)m:*:*:*:*:*:*:*
cisco1100-4g_integrated_services_router-cpe:2.3:h:cisco:1100-4g_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-4gltegb_integrated_services_router-cpe:2.3:h:cisco:1100-4gltegb_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-4gltena_integrated_services_router-cpe:2.3:h:cisco:1100-4gltena_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-4p_integrated_services_router-cpe:2.3:h:cisco:1100-4p_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-6g_integrated_services_router-cpe:2.3:h:cisco:1100-6g_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-8p_integrated_services_router-cpe:2.3:h:cisco:1100-8p_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100-lte_integrated_services_router-cpe:2.3:h:cisco:1100-lte_integrated_services_router:-:*:*:*:*:*:*:*
cisco1100_integrated_services_router-cpe:2.3:h:cisco:1100_integrated_services_router:-:*:*:*:*:*:*:*
cisco1101-4p_integrated_services_router-cpe:2.3:h:cisco:1101-4p_integrated_services_router:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	ios_xe	15.1(4)m	cpe:2.3:o:cisco:ios_xe:15.1\(4\)m:::::::*
cisco	1100-4g_integrated_services_router	-	cpe:2.3:h:cisco:1100-4g_integrated_services_router:-:::::::*
cisco	1100-4gltegb_integrated_services_router	-	cpe:2.3:h:cisco:1100-4gltegb_integrated_services_router:-:::::::*
cisco	1100-4gltena_integrated_services_router	-	cpe:2.3:h:cisco:1100-4gltena_integrated_services_router:-:::::::*
cisco	1100-4p_integrated_services_router	-	cpe:2.3:h:cisco:1100-4p_integrated_services_router:-:::::::*
cisco	1100-6g_integrated_services_router	-	cpe:2.3:h:cisco:1100-6g_integrated_services_router:-:::::::*
cisco	1100-8p_integrated_services_router	-	cpe:2.3:h:cisco:1100-8p_integrated_services_router:-:::::::*
cisco	1100-lte_integrated_services_router	-	cpe:2.3:h:cisco:1100-lte_integrated_services_router:-:::::::*
cisco	1100_integrated_services_router	-	cpe:2.3:h:cisco:1100_integrated_services_router:-:::::::*
cisco	1101-4p_integrated_services_router	-	cpe:2.3:h:cisco:1101-4p_integrated_services_router:-:::::::*

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References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-isdn-q931-dos-67eUZBTf

CVSS2

6.1

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

7.4

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS

0.001

Percentile

25.0%

JSON

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