7.5 High Exploited

CVE-2020-3452 Cisco ASA and FTD Read-Only Path Traversal Vulnerability

Active exploitation observed

· CISA KEV catalogue

Required action Apply updates per vendor instructions.

Ransomware campaigns Not observed so far

Weakness CWE-20

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 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.

Affected products and versions

Product	Affected versions	Fixed in
Cisco Adaptive Security Appliance (ASA) Software 9.14	earliest → < 9.14.1.10	9.14.1.10
Cisco Adaptive Security Appliance (ASA) Software 9.13	earliest → < 9.13.1.10	9.13.1.10
Cisco Adaptive Security Appliance (ASA) Software 9.10	earliest → < 9.10.1.42	9.10.1.42
Cisco Adaptive Security Appliance (ASA) Software 9.9	earliest → < 9.9.2.74	9.9.2.74
Cisco Adaptive Security Appliance (ASA) Software 9.8	earliest → < 9.8.4.20	9.8.4.20
Cisco Adaptive Security Appliance (ASA) Software 9.6	earliest → < 9.6.4.42	9.6.4.42