Cisco Email Security Appliance Denial Of Service Vulnerability

A vulnerability in the Transport Layer Security (TLS) protocol implementation of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to inefficient processing of incoming TLS traffic. An attacker could exploit this vulnerability by sending a series of crafted TLS packets to an affected device. A successful exploit could allow the attacker to trigger a prolonged state of high CPU utilization. The affected device would still be operative, but response time and overall performance may be degraded.There are no workarounds that address this vulnerability.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

算法复杂性

Cisco AsyncOS TLS 安全漏洞

Cisco AsyncOS是美国思科（Cisco）公司的一款应用于思科设备的操作系统。 Cisco AsyncOS TLS存在安全漏洞，该漏洞源于TLS流量的处理效率低，攻击者可以通过向受影响的设备发送特制的TLS数据包来利用此漏洞，受影响的设备仍将可操作，但是响应时间和整体性能可能会下降。

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