CVE-2019-1955: A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an…

high7.5CVSS 3.1

AVNACLPRNUINSUCNIHAN

A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking mechanisms for certain SPF messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. A successful exploit could allow the attacker to bypass the header filters that are configured for the affected device, which could allow malicious content to pass through the device.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
cisco	cisco_email_security_appliance	>= unspecified < n/a	n/a
cisco	email_security_appliance_firmware	< 4.0mr1	4.0mr1
cisco	email_security_appliance_firmware	—	—
cisco	email_security_appliance_header	—	—