CVE-2019-1933— Cisco Email Security Appliance Content Filter Bypass Vulnerability

Cisco Email Security Appliance Content Filter Bypass Vulnerability

A vulnerability in the email message scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured filters on the device. The vulnerability is due to improper input validation of certain email fields. An attacker could exploit this vulnerability by sending a crafted email message to a recipient protected by the ESA. A successful exploit could allow the attacker to bypass configured message filters and inject arbitrary scripting code inside the email body. The malicious code is not executed by default unless the recipient's email client is configured to execute scripts contained in emails.

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输入验证不恰当

Cisco Email Security Appliance AsyncOS Software 输入验证错误漏洞

Cisco Email Security Appliance（ESA）是美国思科（Cisco）公司的一个电子邮件安全设备。AsyncOS Software是运行在其中的一套操作系统。 Cisco ESA中的AsyncOS Software的邮件消息的扫描存在输入验证错误漏洞，该漏洞源于程序没有对邮件字段执行正确的输入验证。远程攻击者可通过向受ESA保护的用户发送特制的邮件消息利用该漏洞绕过所配置的过滤器并在邮件内容中注入任意脚本代码。

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