CVE-2020-3452: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability
A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.
Other sources
Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device.
— CISA
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Disable the WebVPN or AnyConnect features that enable the web services file system on the affected Cisco ASA/FTD device to reduce exposure to HTTP URL directory traversal/read-only path traversal attacks.
Cisco ASA/FTD WebVPN or AnyConnect web services interface WebVPN/AnyConnect features (which enable the web services file system) = disable
Event History
Frequently Asked Questions
What is CVE-2020-3452?
CVE-2020-3452 is a vulnerability that allows an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system.
Which software is affected by CVE-2020-3452?
CVE-2020-3452 affects Cisco Adaptive Security Appliance (ASA) Software versions 9.6 to 9.14 and Cisco Firepower Threat Defense (FTD) Software versions 6.2.3 to 6.6.0.
How severe is the vulnerability CVE-2020-3452?
The severity of CVE-2020-3452 is high, with a CVSS score of 7.5.
How can I fix CVE-2020-3452?
To fix CVE-2020-3452, apply the necessary security patches provided by Cisco.
Where can I find more information about CVE-2020-3452?
You can find more information about CVE-2020-3452 in the references provided: [Link1](http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html), [Link2](http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html), [Link3](http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html).