Vulnerability Monitor

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CVE-2018-0227

A vulnerability in the Secure Sockets Layer (SSL) Virtual Private Network (VPN) Client Certificate Authentication feature for Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to establish an SSL VPN connection and bypass certain SSL certificate verification steps. The vulnerability is due to incorrect verification of the SSL Client Certificate. An attacker could exploit this vulnerability by connecting to the ASA VPN without a proper private key and certificate pair. A successful exploit could allow the attacker to establish an SSL VPN connection to the ASA when the connection should have been rejected. This vulnerability affects Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) Software that is running on the following Cisco products: 3000 Series Industrial Security Appliances (ISA), ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, Adaptive Security Virtual Appliances (ASAv), Firepower 4110 Security Appliances, Firepower 9300 ASA Security Modules. Cisco Bug IDs: CSCvg40155.

Published

2018-04-19T20:29:00.300

Last Modified

2024-11-21T03:37:46.490

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-295
  • Type: Primary
    CWE-295
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco adaptive_security_appliance_software ≤ 9.4.4.13 Yes
Operating System cisco adaptive_security_appliance_software ≤ 9.5.3.9 Yes
Operating System cisco adaptive_security_appliance_software ≤ 9.6.2.21 Yes
Operating System cisco adaptive_security_appliance_software ≤ 9.6.3.17 Yes
Operating System cisco adaptive_security_appliance_software 9.4.3.1 Yes
Operating System cisco adaptive_security_appliance_software 9.4.3.2 Yes
Operating System cisco adaptive_security_appliance_software 9.5.2.7 Yes
Operating System cisco adaptive_security_appliance_software 9.5.2.8 Yes
Application cisco firepower_threat_defense ≤ 6.0.1.4 Yes
Application cisco firepower_threat_defense ≤ 6.1.0.5 Yes
References