CVE-2020-3187

01/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.

02/Affected products

cisco: secure firewall threat defense; cisco: asa 5505 firmware; cisco: asa 5505; cisco: asa 5510 firmware; cisco: asa 5510; cisco: asa 5512-x firmware; cisco: asa 5512-x; cisco: asa 5515-x firmware; cisco: asa 5515-x; cisco: asa 5520 firmware; cisco: asa 5520; cisco: asa 5525-x firmware; cisco: asa 5525-x; cisco: asa 5540 firmware; cisco: asa 5540

03/References4

• tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… Vendor Advisory
• tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… Vendor Advisory
• packetstormsecurity.com/files/158648/Cisco-Adaptive-Security-Ap… ExploitThird Party AdvisoryVDB Entry
• packetstormsecurity.com/files/158648/Cisco-Adaptive-Security-Ap… ExploitThird Party AdvisoryVDB Entry