Vulnerability Monitor

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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.

Published

2020-09-24T18:15:21.230

Last Modified

2024-11-21T05:31:13.380

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.4 (HIGH)

CVSSv2 Vector

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

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

6.5

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-20
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe 15.1\(4\)m Yes
Hardware cisco 1100-4g_integrated_services_router - No
Hardware cisco 1100-4gltegb_integrated_services_router - No
Hardware cisco 1100-4gltena_integrated_services_router - No
Hardware cisco 1100-4p_integrated_services_router - No
Hardware cisco 1100-6g_integrated_services_router - No
Hardware cisco 1100-8p_integrated_services_router - No
Hardware cisco 1100-lte_integrated_services_router - No
Hardware cisco 1100_integrated_services_router - No
Hardware cisco 1101-4p_integrated_services_router - No
Hardware cisco 1101_integrated_services_router - No
Hardware cisco 1109-2p_integrated_services_router - No
Hardware cisco 1109-4p_integrated_services_router - No
Hardware cisco 1109_integrated_services_router - No
Hardware cisco 1111x-8p_integrated_services_router - No
Hardware cisco 1111x_integrated_services_router - No
Hardware cisco 111x_integrated_services_router - No
Hardware cisco 1120_integrated_services_router - No
Hardware cisco 1160_integrated_services_router - No
Hardware cisco 422_integrated_services_router - No
Hardware cisco 4321\/k9-rf_integrated_services_router - No
Hardware cisco 4321\/k9-ws_integrated_services_router - No
Hardware cisco 4321\/k9_integrated_services_router - No
Hardware cisco 4331\/k9-rf_integrated_services_router - No
Hardware cisco 4331\/k9-ws_integrated_services_router - No
Hardware cisco 4331\/k9_integrated_services_router - No
Hardware cisco 4351\/k9-rf_integrated_services_router - No
Hardware cisco 4351\/k9-ws_integrated_services_router - No
Hardware cisco 4351\/k9_integrated_services_router - No
Hardware cisco 4431_integrated_services_router - No
Hardware cisco 4461_integrated_services_router - No
Hardware cisco asr_1000-x - No
Hardware cisco asr_1001 - No
Hardware cisco asr_1001-x - No
Hardware cisco asr_1002 - No
Hardware cisco asr_1002-x - No
Hardware cisco asr_1004 - No
Hardware cisco asr_1006 - No
Hardware cisco asr_1013 - No
Hardware cisco asr1001-hx - No
Hardware cisco asr1001-hx-rf - No
Hardware cisco asr1001-x - No
Hardware cisco asr1001-x-rf - No
Hardware cisco asr1001-x-ws - No
Hardware cisco asr1002-hx - No
Hardware cisco asr1002-hx-rf - No
Hardware cisco asr1002-hx-ws - No
Hardware cisco asr1002-x - No
Hardware cisco asr1002-x-rf - No
Hardware cisco asr1002-x-ws - No
Hardware cisco csr1000v - No
References