CVE-2020-3452 KEV EXPLOIT
Patch first
On CISA KEV — known exploited in the wild, due 2022-05-03.
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.
Scoring
| CVSS | 7.5 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| EPSS | 99.99% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-20 |
| On CISA KEV | yes — remediate by 2022-05-03 |
| Public exploit | yes |
| Published | 2020-07-22 |
| Last modified | 2026-08-11 |
CISA KEV
| Name | Cisco ASA and FTD Read-Only Path Traversal Vulnerability |
|---|---|
| Added | 2021-11-03 |
| Due | 2022-05-03 |
| Vendor / product | Cisco / Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) |
| Ransomware use | none reported |
Affected (14)
| Vendor | Product |
|---|---|
| cisco | adaptive security appliance software |
| cisco | asa 5505 |
| cisco | asa 5510 |
| cisco | asa 5512-x |
| cisco | asa 5515-x |
| cisco | asa 5520 |
| cisco | asa 5525-x |
| cisco | asa 5540 |
| cisco | asa 5545-x |
| cisco | asa 5550 |
| cisco | asa 5555-x |
| cisco | asa 5580 |
| cisco | asa 5585-x |
| cisco | secure firewall threat defense |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Cisco ASA 9.14.1.10 and FTD 6.6.0.1 - Path Traversal (2) | 2020-12-15 |
| exploit-db | Cisco ASA and FTD 9.6.4.42 - Path Traversal | 2020-10-12 |
| exploit-db | Cisco Adaptive Security Appliance Software 9.11 - Local File Inclusion | 2020-07-28 |
References
- http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html
- http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html
- http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html
- http://packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86
- http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.html
- http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.html
- http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.html
- http://packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3452
→ the Explorer · watch your stack · NVD