PT-2020-4723 · Cisco · Cisco Ftd+1

Published 2020-10-21 · Updated 2023-08-16 · CVE-2020-3561

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Cisco Adaptive Security Appliance (ASA) Software (affected versions not specified) Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description: A vulnerability in the Clientless SSL VPN (WebVPN) of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to inject arbitrary HTTP headers in the responses of the affected system. The vulnerability is due to improper input sanitization. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit 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.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Special Elements Injection

Weakness Enumeration

CWE-74

CWE-93

Related Identifiers

BDU:2020-05275

CVE-2020-3561

Affected Products

Cisco Asa

Cisco Ftd

References · 5

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-crlf-inj-BX9uRwSn · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-crlf-inj-BX9uRwSn · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-05275 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3561 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3561 · Security Note