CVE-2020-3187

critical

Description

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 obtain read and delete access to sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of the HTTP URL. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences. An exploit could allow the attacker to view or delete arbitrary files on the targeted system. When the device is reloaded after exploitation of this vulnerability, any files that were deleted are restored. The attacker can only view and delete files within the web services file system. This file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability can not be used to obtain access to ASA or FTD system files or underlying operating system (OS) files. Reloading the affected device will restore all files within the web services file system.

From the Tenable Blog

Cisco Patches Multiple Flaws in Adaptive Security Appliance and Firepower Threat Defense (CVE-2020-3187)

Published: 2020-05-08

Cisco releases a bundled publication to address 12 vulnerabilities across Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD), including a critical path traversal vulnerability. Update 05/09/20: This blog has been updated to remove references about Firepower Management Center (FMC) software, as Cisco have confirmed that it is not affected.