critical
10
CWE
415
Advisory Published
Updated

CVE-2018-0101: Double Free

First published: Mon Jan 29 2018(Updated: )

A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to an attempt to double free a region of memory when the webvpn feature is enabled on the Cisco ASA device. An attacker could exploit this vulnerability by sending multiple, crafted XML packets to a webvpn-configured interface on the affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, or cause a reload of the affected device. This vulnerability affects Cisco ASA Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (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, ASA 1000V Cloud Firewall, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4110 Security Appliance, Firepower 9300 ASA Security Module, Firepower Threat Defense Software (FTD). Cisco Bug IDs: CSCvg35618.

Credit: ykramarz@cisco.com ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Adaptive Security Appliance<9.1.7.23
Cisco Adaptive Security Appliance>=9.2.0<9.2.4.27
Cisco Adaptive Security Appliance>=9.3.0<9.4.4.16
Cisco Adaptive Security Appliance>=9.5.0<9.6.4.3
Cisco Adaptive Security Appliance>=9.7.0<9.7.1.21
Cisco Adaptive Security Appliance>=9.8.0<9.8.2.20
Cisco Adaptive Security Appliance>=9.9.0<9.9.1.2
Cisco Firepower Threat Defense=6.0.0
Cisco Firepower Threat Defense=6.0.1
Cisco Firepower Threat Defense=6.1.0
Cisco Firepower Threat Defense=6.2.0
Cisco Firepower Threat Defense=6.2.1
Cisco Firepower Threat Defense=6.2.2
Cisco Adaptive Security Appliance Software<9.1.7.23
Cisco Adaptive Security Appliance Software>=9.2.0<9.2.4.27
Cisco Adaptive Security Appliance Software>=9.3.0<9.4.4.16
Cisco Adaptive Security Appliance Software>=9.5.0<9.6.4.3
Cisco Adaptive Security Appliance Software>=9.7.0<9.7.1.21
Cisco Adaptive Security Appliance Software>=9.8.0<9.8.2.20
Cisco Adaptive Security Appliance Software>=9.9.0<9.9.1.2

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-0101?

    CVE-2018-0101 has a critical severity rating due to its potential for remote code execution.

  • How do I fix CVE-2018-0101?

    To fix CVE-2018-0101, upgrade to the latest version of Cisco Adaptive Security Appliance Software or Cisco Firepower Threat Defense that mitigates the vulnerability.

  • What software is affected by CVE-2018-0101?

    CVE-2018-0101 affects multiple versions of Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense.

  • What is the potential impact of CVE-2018-0101?

    The potential impact of CVE-2018-0101 includes system reload or remote code execution by an unauthenticated attacker.

  • Is there a workaround for CVE-2018-0101?

    There are no documented workarounds for CVE-2018-0101; updating to a fixed version is the recommended action.

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