Detections
Analytics
Cisco IOS XE Software ISDN Q.931 DoS (cisco-sa-iosxe-isdn-q931-dos-67eUZBTf)
high Nessus Plugin ID 141372
Language:
Synopsis
The remote device is missing a vendor-supplied security patchDescription
According to its self-reported version, IOS-XE is affected by a DoS vulnerability in the ISDN subsystem due to insufficient input validation when the ISDN Q.931 messages are processed. An unauthenticated, adjacent 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 DoS condition.Please see the included Cisco BID and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvr57760See Also
http://www.nessus.org/u?2af093d4
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74268
Plugin Details
Severity: High
ID: 141372
File Name: cisco-sa-iosxe-isdn-q931-dos-67eUZBTf-iosxe.nasl
Version: 1.11
Type: combined
Family: CISCO
Published: 10/12/2020
Updated: 5/3/2024
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.5
Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2020-3511
CVSS v3
Risk Factor: High
Base Score: 7.4
Temporal Score: 6.4
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:cisco:ios_xe
Required KB Items: Host/Cisco/IOS-XE/Version
Exploit Ease: No known exploits are available
Patch Publication Date: 9/24/2020
Vulnerability Publication Date: 9/24/2020
Reference Information
CVE: CVE-2020-3511