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Cisco Dual WAN Gigabit VPN Routers < 1.0.03.18 SSL RCE and DoS (cisco-sa-sb-rce-dos-9ZAjkx4)

critical Nessus Plugin ID 140452

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco Small Business RV Series Router Firmware is affected by a RCE and DoS vulnerability in the Secure Sockets Layer (SSL) VPN feature due to improper validation of HTTP requests. By sending a crafted HTTP request to the device, an unauthenticated, remote attacker could execute arbitrary code or cause the device to reload, resulting in a denial of service (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 CSCvu36543

See Also

http://www.nessus.org/u?a0e9372a

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu36543

Plugin Details

Severity: Critical

ID: 140452

File Name: cisco-sa-sb-rce-dos-9ZAjkx4.nasl

Version: 1.12

Type: remote

Family: CISCO

Published: 9/9/2020

Updated: 3/29/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-3357

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: x-cpe:/o:cisco:small_business_rv_series_router_firmware

Required KB Items: Settings/ParanoidReport, Cisco/Small_Business_Router/Version, Cisco/Small_Business_Router/Model

Exploit Ease: No known exploits are available

Patch Publication Date: 7/15/2020

Vulnerability Publication Date: 7/15/2020

Reference Information

CVE: CVE-2020-3357

CWE: 20

CISCO-SA: cisco-sa-sb-rce-dos-9ZAjkx4

CISCO-BUG-ID: CSCvu36543