CVEvulnerability

CVE-2020-3452

7.5 HIGH Known exploited Published 2020-07-22 Modified 2026-08-11 Official page ↗

CISA Known Exploited Vulnerability

Cisco ASA and FTD Read-Only Path Traversal Vulnerability — Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an improper input validation vulnerability when HTTP requests process URLs. 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.

Added to KEV
2021-11-03
Remediation due
2022-05-03
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-3452
Status
Analyzed
Published
2020-07-22
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-20, CWE-22

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 configurations

• cisco adaptive security appliance software (>= 9.6 < 9.6.4.42) • cisco adaptive security appliance software (>= 9.8 < 9.8.4.20) • cisco adaptive security appliance software (>= 9.9 < 9.9.2.74) • cisco adaptive security appliance software (>= 9.10 < 9.10.1.42) • cisco adaptive security appliance software (>= 9.12 < 9.12.3.12) • cisco adaptive security appliance software (>= 9.13 < 9.13.1.10) • cisco adaptive security appliance software (>= 9.14 < 9.14.1.10) • cisco secure firewall threat defense (>= 6.2.3 < 6.2.3.16) • cisco secure firewall threat defense (>= 6.3.0 < 6.3.0.6) • cisco secure firewall threat defense (>= 6.4.0 < 6.4.0.10) • cisco secure firewall threat defense (>= 6.5.0 < 6.5.0.5) • cisco secure firewall threat defense (>= 6.6.0 < 6.6.0.1)

Related

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

Referenced by CWE · observed example (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References