Detections
Analytics
Cisco IOS XE Software Zone Based Firewall DoS (cisco-sa-zbfw-94ckG4G)
high Nessus Plugin ID 141460
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Synopsis
The remote device is missing a vendor-supplied security patch.Description
According to its self-reported version, IOS-XE is affected by multiple denial of service vulnerabilities in the zone-based firewall feature due to incomplete handling of Layer 4 packets through the device. An unauthenticated, remote attacker can exploit these, by sending a certain sequence of traffic patterns through the device, to cause the device to reload or stop forwarding traffic through the firewall, causing a denial of service.Solution
Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvs71952 and CSCvt52986.See Also
http://www.nessus.org/u?b1a34db0
http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74268
Plugin Details
Severity: High
ID: 141460
File Name: cisco-sa-zbfw-94ckG4G-iosxe.nasl
Version: 1.8
Type: local
Family: CISCO
Published: 10/15/2020
Updated: 9/28/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS Score Source: CVE-2020-3480
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/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-2020-3421, CVE-2020-3480