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Home›CVE index›CVE-2020-3187
Priority reviewCritical

CVE-2020-3187

Cisco Cisco Adaptive Security Appliance (ASA) Software, secure firewall threat defense, asa 5505 firmware

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...

CVSS
9.1
EPSS
96.6%
99.9% percentile
CISA KEV
Not listed
Published
2020.05.07
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability96.6%
Technical severityCVSS 9.1

Vulnerability overview

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...

Affected product and versions

Product
Cisco Cisco Adaptive Security Appliance (ASA) Software, secure firewall threat defense, asa 5505 firmware
Affected versions
>= 6.2.3 < 6.2.3.16, >= 6.3.0 < 6.3.0.6, >= 6.4.0 < 6.4.0.8, >= 6.5.0 < 6.5.0.4, 9.6(4), >= 9.6 < 9.6.4.40, >= 9.8 < 9.8.4.15, >= 9.9 < 9.9.2.66, >= 9.10 < 9.10.1.37, >= 9.12 < 9.12.3.2, >= 9.13 < 9.13.1.7
Fixed versions
6.2.3.16, 6.3.0.6, 6.4.0.8, 6.5.0.4, 9.6.4.40, 9.8.4.15, 9.9.2.66, 9.10.1.37, 9.12.3.2, 9.13.1.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Cisco Cisco Adaptive Security Appliance (ASA) Software, secure firewall threat defense, asa 5505 firmware and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE
CWE-22