CVE-2020-3452

Cisco ASA and FTD Read-Only Path Traversal

7.5 HIGHActively exploited (CISA KEV)Public exploitEPSS 100.0%

Published22 Jul 2020
Added to CISA KEV3 Nov 2021
Remediation due3 May 2022

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: 3 Nov 2021Federal remediation due: 3 May 2022

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Cisco Secure Firewall Threat Defense≥ 6.2.3 < 6.2.3.16 · ≥ 6.3.0 < 6.3.0.6 · ≥ 6.4.0 < 6.4.0.10 · ≥ 6.5.0 < 6.5.0.5

Cisco Adaptive Security Appliance Software≥ 9.10 < 9.10.1.42 · ≥ 9.12 < 9.12.3.12 · ≥ 9.13 < 9.13.1.10 · ≥ 9.14 < 9.14.1.10

Remediation

Fixed in

Cisco Secure Firewall Threat Defense≥ 6.2.3.16

Cisco Adaptive Security Appliance Software≥ 9.10.1.42

Patch & vendor advisories

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86

References

http://packetstormsecurity.com/files/158646/Cisco-ASA-FTD-Remote-File-Disclosure.htmlThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/158647/Cisco-Adaptive-Security-Appliance-Software-9.11-Local-File-Inclusion.htmlExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/159523/Cisco-ASA-FTD-9.6.4.42-Path-Traversal.htmlExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/160497/Cisco-ASA-9.14.1.10-FTD-6.6.0.1-Path-Traversal.htmlExploitThird Party AdvisoryVDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3452US Government Resource

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2020-3452 being actively exploited?

Yes. CVE-2020-3452 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2020-3452?

CVE-2020-3452 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 100.0% probability of exploitation.

Which products are affected by CVE-2020-3452?

Affected products include Cisco Secure Firewall Threat Defense, Cisco Adaptive Security Appliance Software.

How do I fix CVE-2020-3452?

Upgrade affected software to a fixed version, for example Cisco Secure Firewall Threat Defense 6.2.3.16, Cisco Adaptive Security Appliance Software 9.10.1.42 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-3452 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.