CVE-2019-1947: Input Validation
First published: Wed Sep 23 2020(Updated: )
A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause the CPU utilization to increase to 100 percent, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of email messages that contain large attachments. An attacker could exploit this vulnerability by sending a malicious email message through the targeted device. A successful exploit could allow the attacker to cause a permanent DoS condition due to high CPU utilization. This vulnerability may require manual intervention to recover the ESA.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Email Security Appliance | =11.1.0-131 | |
| Cisco AsyncOS | =12.1.0-085 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-1947.
What is the severity rating of CVE-2019-1947?
CVE-2019-1947 has a severity rating of 8.6 (high).
Which software is affected by CVE-2019-1947?
Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) versions 11.1.0-131 and Cisco AsyncOS version 12.1.0-085 are affected by CVE-2019-1947.
How does this vulnerability impact the affected devices?
The vulnerability could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition by increasing CPU utilization to 100 percent.
How can I fix CVE-2019-1947?
To fix CVE-2019-1947, Cisco has released software updates. Please refer to the Cisco Security Advisory for more information.
- collector/nvd-index
- vendor/cisco
- canonical/cisco email security appliance
- version/cisco email security appliance/11.1.0-131
- canonical/cisco asyncos
- version/cisco asyncos/12.1.0-085