CVE-2019-1669— Cisco Firepower Threat Defense Software Packet Inspection and Enforcement Bypass Vulnerability

Cisco Firepower Threat Defense Software Packet Inspection and Enforcement Bypass Vulnerability

A vulnerability in the data acquisition (DAQ) component of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass configured access control policies or cause a denial of service (DoS) condition. The vulnerability exists because the affected software improperly manages system memory resources when inspecting traffic. An attacker could exploit this vulnerability by generating specific traffic patterns for the software to inspect. A successful exploit could allow the attacker to exhaust system memory resources used for traffic inspection. Depending on the configuration, the FTD Software could fail open and cease to inspect traffic or fail closed and result in a DoS condition. This vulnerability may require manual intervention to restore the software.

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保护机制失效

Cisco Firepower Threat Defense Software data acquisition组件安全漏洞

Cisco Firepower Threat Defense（FTD）Software是由美国思科（Cisco）公司的一套提供下一代防火墙服务的统一软件。data acquisition（DAQ）是其中的一个数据采集组件。 Cisco FTD Software 6.3.0版本（Firepower 4100或Firepower 9300 Series平台上）中的DAQ组件存在安全漏洞，该漏洞源于程序没有正确地管理系统内存资源。远程攻击者可利用该漏洞绕过所配置的访问控制策略或造成拒绝服务。

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