CVE-2019-1921: cisco cisco email security appliance (esa) Improper Input Validation

Vulnerability summary

CVE-2019-1921 is a high (CVSS 7.5) Improper Input Validation vulnerability in cisco cisco email security appliance (esa). EPSS estimates a 1.41% chance of exploitation in the next 30 days, higher than 72.4% of scored vulnerabilities.

Timeline

1. 06-07-2019
   PublishedVulnerability first disclosed.
2. 19-11-2024
   Last modifiedVulnerability information updated.

Description

A vulnerability in the attachment 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 naming a malicious attachment with a specific pattern. A successful exploit could allow the attacker to bypass configured content filters that would normally block the attachment.

• CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.