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[email protected]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

cve-2020-3511

isdn subsystem

cisco

ios

software

xe software

vulnerability

unauthenticated

adjacent attacker

denial of service

dos

input validation

isdn q.931

malicious message

6.1 Medium

CVSS2

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

7.4 High

CVSS3

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

0.001 Low

EPSS

Percentile

25.2%

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-

CPENameOperatorVersion
cisco:ios_xecisco ios xeeq15.1\(4\)m

CPE	Name	Operator	Version
cisco:ios_xe	cisco ios xe	eq	15.1\(4\)m

CNA Affected

[
  {
    "product": "Cisco IOS ",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

References

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

6.1 Medium

CVSS2

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

7.4 High

CVSS3

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

0.001 Low

EPSS

Percentile

25.2%

JSON

Related for CVE-2020-3511

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