What is CVE-2020-3452?

CVE-2020-3452 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-07-22.

How severe is CVE-2020-3452?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-3452 known to be exploited?

Yes. CVE-2020-3452 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 159 public proof-of-concept repositories are indexed.

Path Traversal in Cisco Adaptive Security Appliance Software

CVE-2020-3452

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 1.000 (100.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
psirt@cisco.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
psirt@cisco.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
psirt@cisco.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
psirt@cisco.com (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2020-3452?: CVE-2020-3452 is a high-severity vulnerability in Cisco Adaptive Security Appliance Software, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-07-22.
How severe is CVE-2020-3452?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-3452 known to be exploited?: Yes. CVE-2020-3452 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 159 public proof-of-concept repositories are indexed.