What is CVE-2019-1921?

CVE-2019-1921 is a vulnerability in the attachment scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) that could allow an unauthenticated, remote attacker to bypass configured content filters on the device.

What is the severity of CVE-2019-1921?

The severity of CVE-2019-1921 is high, with a severity value of 7.5.

How does CVE-2019-1921 affect Cisco Email Security Appliance?

CVE-2019-1921 affects Cisco Email Security Appliance running version 12.0.0-419.

How can an attacker exploit CVE-2019-1921?

An attacker can exploit CVE-2019-1921 by sending a specially crafted email to the target device, bypassing content filters.

What is the recommended action to mitigate CVE-2019-1921?

To mitigate CVE-2019-1921, users should upgrade to a fixed software release.

Vulnerability/
CVE-2019-1921

high

7.5

CWE

6/7/2019

19/11/2024

CVE-2019-1921: Cisco Email Security Appliance Content Filter Bypass Vulnerability

First published: Sat Jul 06 2019(Updated: )

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.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Email Security Appliance	=12.0.0-419

Never miss a vulnerability like this again

Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-esa-bypass

Frequently Asked Questions

What is CVE-2019-1921?
CVE-2019-1921 is a vulnerability in the attachment scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) that could allow an unauthenticated, remote attacker to bypass configured content filters on the device.
What is the severity of CVE-2019-1921?
The severity of CVE-2019-1921 is high, with a severity value of 7.5.
How does CVE-2019-1921 affect Cisco Email Security Appliance?
CVE-2019-1921 affects Cisco Email Security Appliance running version 12.0.0-419.
How can an attacker exploit CVE-2019-1921?
An attacker can exploit CVE-2019-1921 by sending a specially crafted email to the target device, bypassing content filters.
What is the recommended action to mitigate CVE-2019-1921?
To mitigate CVE-2019-1921, users should upgrade to a fixed software release.

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/weakness
agent/title
agent/references
agent/author
agent/last-modified-date
agent/event
agent/description
agent/first-publish-date
agent/tags
vendor/cisco
canonical/cisco email security appliance
version/cisco email security appliance/12.0.0-419

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.