CVE-2019-1831: Cisco Email Security Appliance Content Filter Bypass Vulnerability
First published: Thu Apr 18 2019(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Email Security Appliance | =11.1.2-023 | |
| Cisco Email Security Appliance | =12.0.0-208 |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1831?
CVE-2019-1831 is a vulnerability in the email message 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.
How severe is CVE-2019-1831?
CVE-2019-1831 has a severity rating of 5.3, which is considered medium.
Which software versions are affected by CVE-2019-1831?
The affected software versions for CVE-2019-1831 are Cisco Email Security Appliance 11.1.2-023 and 12.0.0-208.
What is the Common Weakness Enumeration (CWE) for CVE-2019-1831?
The CWE for CVE-2019-1831 is CWE-20.
How can I fix CVE-2019-1831?
To fix CVE-2019-1831, users should upgrade to a fixed software version provided by Cisco.
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