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CVE-2019-1933

5.8 · MEDIUM

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…

Published Jul 6, 2019CWE-20EPSS 1.24%

Overview

CVE-2019-1933 is a medium-severity vulnerability. It was published on July 6, 2019 and has a CVSS 3.0 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-esa-filterpassReftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-esa-filterpass

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Frequently asked questions

What is CVE-2019-1933?

CVE-2019-1933 is a medium-severity vulnerability. It was published on July 6, 2019 and has a CVSS 3.0 base score of 5.8 (MEDIUM).

How severe is CVE-2019-1933?

This vulnerability has a CVSS 3.0 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-1933?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-1933?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-1933 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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