Cisco SD-WAN Solution Packet Filtering Bypass (cisco-sa-20190807-sd-wan-bypass)

medium Nessus Plugin ID 147761
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The remote device is missing a vendor-supplied security patch


According to its self-reported version, Cisco SD-WAN Solution is affected by a vulnerability in the packet filtering features due to improper traffic filtering conditions on an affected device. An unauthenticated, remote attacker can exploit this, by crafting a malicious TCP packet with specific characteristics, in order to bypass L3 and L4 traffic filters.

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


Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvn67202, CSCvr64177

See Also

Plugin Details

Severity: Medium

ID: 147761

File Name: cisco-sa-20190807-sd-wan-bypass.nasl

Version: 1.3

Type: local

Family: CISCO

Published: 3/15/2021

Updated: 3/15/2021

Dependencies: cisco_vedge_detect.nbin

Risk Information

CVSS Score Source: CVE-2019-1951


Risk Factor: Low

Score: 1.6


Risk Factor: Medium

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


Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

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

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

Vulnerability Information

CPE: cpe:/o:cisco:sd-wan_firmware

Required KB Items: Cisco/Viptela/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 8/7/2019

Vulnerability Publication Date: 8/7/2019

Reference Information

CVE: CVE-2019-1951