Cisco Firepower Threat Defense Software WebVPN CRLF Injection (cisco-sa-asa-ftd-crlf-inj-BX9uRwSn)

medium Nessus Plugin ID 149525
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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, the Clientless SSL VPN (WebVPN) of Cisco Firepower Threat Defense (FTD) Software is affected by an CRLF injection vulnerability due to improper input sanitization. An unauthenticated, remote attacker can exploit this by persuading a user of the interface to click a crafted link which could allow the attacker to conduct a CRLF injection attack, adding arbitrary HTTP headers in the responses of the system and redirecting the user to arbitrary websites.

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

Note that Nessus has not tested for this issue 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 CSCvt18028

See Also

http://www.nessus.org/u?f487e64d

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvt18028

Plugin Details

Severity: Medium

ID: 149525

File Name: cisco-sa-asa-ftd-crlf-inj-BX9uRwSn-ftd.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 5/17/2021

Updated: 6/1/2021

Dependencies: cisco_enumerate_firepower.nbin

Risk Information

CVSS Score Source: CVE-2020-3561

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

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

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.1

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

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

Vulnerability Information

CPE: cpe:/o:cisco:firepower_threat_defense, cpe:/a:cisco:firepower_threat_defense

Required KB Items: installed_sw/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-2020-3561

IAVA: 2020-A-0488

CISCO-BUG-ID: CSCvt18028

CISCO-SA: cisco-sa-asa-ftd-crlf-inj-BX9uRwSn

CWE: 93