4.3
CVSSv2

CVE-2020-3561

Published: 21/10/2020 Updated: 16/08/2023
CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6
CVSS v3 Base Score: 4.7 | Impact Score: 1.4 | Exploitability Score: 2.8
VMScore: 383
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Vulnerability Summary

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 malicious user 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 malicious user to conduct a CRLF injection attack, adding arbitrary HTTP headers in the responses of the system and redirecting the user to arbitrary websites.

Vulnerability Trend

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cisco firepower threat defense

cisco adaptive security appliance

cisco adaptive security appliance software

Vendor Advisories

Update from October 22nd, 2020: Cisco has become aware of a new Cisco Adaptive Security Appliance vulnerability that could affect the fixed releases recommended for code trains 913 and 914 in the Fixed Software section of this advisory See the Cisco Adaptive Security Appliance Software SSL/TLS Denial of Service Vulnerability for additional infor ...