Cisco IOS XE Software Packet Filtering Bypass (cisco-sa-cedge-filt-bypass-Y6wZMqm4)

medium Nessus Plugin ID 143154
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VPR Score: 3.6


The remote device is missing a vendor-supplied security patch


According to its self-reported version, Cisco IOS XE is affected by a packet filtering bypass vulnerability.
The vulnerability is due to improper traffic filtering conditions on an affected device. An unauthenticated, remote attacker could exploit this vulnerability by crafting a malicious TCP packet with specific characteristics and sending it to a targeted device. A successful exploit could allow the attacker to bypass the L3 and L4 traffic filters and inject an arbitrary packet into the network.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.


Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvw12895

See Also

Plugin Details

Severity: Medium

ID: 143154

File Name: cisco-sa-iosxe-cedge-filt-bypass-Y6wZMqm4.nasl

Version: 1.17

Type: combined

Family: CISCO

Published: 11/20/2020

Updated: 5/7/2021

Dependencies: cisco_ios_xe_version.nasl

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2020-3444

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version, Host/Cisco/SDWAN

Exploit Ease: No known exploits are available

Patch Publication Date: 11/4/2020

Vulnerability Publication Date: 11/4/2020

Reference Information

CVE: CVE-2020-3444


CISCO-SA: cisco-sa-cedge-filt-bypass-Y6wZMqm4

IAVA: 2020-A-0540

CWE: 20