CVE-2019-1831 – Cisco Email Security Appliance Content Filter Bypass Vulnerability

https://notcve.org/view.php?id=CVE-2019-1831

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 content filters on the device. The vulnerability is due to improper input validation of the email body. An attacker could exploit this vulnerability by inserting specific character strings in the message. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email. Una vulnerabilidad en el análisis de mensajes de correo electrónico del software AsyncOS de Cisco para Email Security Appliance (ESA) de Cisco, podría permitir a un atacante remoto no autenticado omitir los filtros de contenido configurados en el dispositivo. • http://www.securityfocus.com/bid/108021 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190417-esa-filter-bypass • CWE-20: Improper Input Validation •