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CVE-2020-3561— Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN CRLF Injection Vulnerability

Quick assessment

Affected
Cisco Cisco Adaptive Security Appliance (ASA) Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliance (ASA) 存在注入漏洞，该漏洞源于不正确的输入卫生处理。攻击者可利用该漏洞可以通过说服界面的用户单击精心设计的链接来利用这个漏洞。成功利用该漏洞可以让攻击者可利用该漏洞进行CRLF注入攻击。

AI Predicted 6.5 Difficulty: Easy EPSS 1.29% · P69
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I. Basic Information for CVE-2020-3561

Vulnerability Information
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Vulnerability Title
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN CRLF Injection Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Adaptive Security Appliances Software 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Adaptive Security Appliances Software（ASA Software）是美国思科（Cisco）公司的一套防火墙和网络安全平台。该平台提供了对数据和网络资源的高度安全的访问等功能。 Cisco Adaptive Security Appliance (ASA) 存在注入漏洞，该漏洞源于不正确的输入卫生处理。攻击者可利用该漏洞可以通过说服界面的用户单击精心设计的链接来利用这个漏洞。成功利用该漏洞可以让攻击者可利用该漏洞进行CRLF注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Adaptive Security Appliance (ASA) Software n/a -

II. Public POCs for CVE-2020-3561

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III. Intelligence Information for CVE-2020-3561

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Vendor Advisories for CVE-2020-3561 (1)

Same Patch Batch · Cisco · 2020-10-21 · 40 CVEs total

CVE-2020-3456 8.8 HIGH Cisco FXOS Software Firepower Chassis Manager Cross-Site Request Forgery Vulnerability
CVE-2020-3373 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IP Fragme
CVE-2020-3528 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software OSPFv2 Li
CVE-2020-3529 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL VPN D
CVE-2020-3572 8.6 HIGH Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SSL/TLS S
CVE-2020-3533 8.6 HIGH Cisco Firepower Threat Defense Software SNMP Denial of Service Vulnerability
CVE-2020-3514 8.2 HIGH Cisco Firepower Threat Defense Software Multi-Instance Container Escape Vulnerability
CVE-2020-3410 8.1 HIGH Cisco Firepower Management Center Software Common Access Card Authentication Bypass Vulner
CVE-2020-3555 6.8 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software SIP Denia
CVE-2020-3581 6.1 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2020-3582 6.1 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2020-3583 6.1 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2020-3599 6.1 MEDIUM Cisco Adaptive Security Appliance Software Web-Based Management Interface Reflected Cross-
CVE-2020-3580 6.1 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Servi
CVE-2020-3565 5.8 MEDIUM Cisco Firepower Threat Defense Software TCP Intercept Bypass Vulnerability
CVE-2020-3585 5.3 MEDIUM Cisco Firepower 1000 Series Bleichenbacher Attack Vulnerability
CVE-2020-3578 5.3 MEDIUM Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Po
CVE-2020-3557 5.3 MEDIUM Cisco Firepower Management Center Software Denial of Service Vulnerability
CVE-2020-3558 4.7 MEDIUM Cisco Firepower Management Center Software Open Redirect Vulnerability
CVE-2020-3299 Multiple Cisco Products SNORT HTTP Detection Engine File Policy Bypass Vulnerability

Showing top 20 of 40 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Adaptive Security Appliance (ASA) Software
Same vendor: Cisco
Same weakness: CWE-93

V. Comments for CVE-2020-3561

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