Cisco Firepower Threat Defense (FTD) Software FTP Inspection Bypass Vulnerability (cisco-sa-asaftd-ftpbypass-HY3UTxYu)

medium Nessus Plugin ID 164349

Synopsis

The remote device is missing a vendor-supplied security patch (cisco-sa-asaftd-ftpbypass-HY3UTxYu)

Description

According to its self-reported version number, there is a vulnerability in the FTP inspection engine of Cisco Firepower Threat Defense (FTD) Software that could allow an unauthenticated, remote attacker to bypass FTP inspection. The vulnerability is due to ineffective flow tracking of FTP traffic. An attacker could exploit this vulnerability by sending crafted FTP traffic through an affected device. A successful exploit could allow the attacker to bypass FTP inspection and successfully complete FTP connections.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvt13445

See Also

http://www.nessus.org/u?bf58e222

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt13445

Plugin Details

Severity: Medium

ID: 164349

File Name: cisco-sa-asaftd-ftpbypass-HY3UTxYu-ftd.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 8/23/2022

Updated: 3/31/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2020-3564

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: cpe:/o:cisco:cisco:firepower_threat_defense

Exploit Ease: No known exploits are available

Patch Publication Date: 10/21/2020

Vulnerability Publication Date: 10/21/2020

Reference Information

CVE: CVE-2020-3564

CWE: 284

CISCO-SA: cisco-sa-asaftd-ftpbypass-HY3UTxYu

IAVA: 2020-A-0488-S

CISCO-BUG-ID: CSCvt13445