SSL: Cisco Adaptive Security Appliance Webvpn XML Parser Double Free

This signature detects attempts to exploit a known vulnerability against Cisco Adaptive Security Appliance. A successful attack can lead to arbitrary code execution.

Extended Description

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.

Affected Products

Cisco adaptive_security_appliance_software

References

BugTraq: 102845

CVE: CVE-2018-0101

Short Name

SSL:CISCO-ASA-WEBVPN-CE

Severity

Major

Recommended

True

Recommended Action

Drop

SSL: Cisco Adaptive Security Appliance Webvpn XML Parser Double Free

Extended Description

Affected Products

References

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