CVE-2020-3132: Cisco Email Security Appliance Shortened URL Denial of Service Vulnerability
First published: Wed Feb 19 2020(Updated: )
A vulnerability in the email message scanning feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause a temporary denial of service (DoS) condition on an affected device. The vulnerability is due to inadequate parsing mechanisms for specific email body components. An attacker could exploit this vulnerability by sending a malicious email containing a high number of shortened URLs through an affected device. A successful exploit could allow the attacker to consume processing resources, causing a DoS condition on an affected device. To successfully exploit this vulnerability, certain conditions beyond the control of the attacker must occur.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Cloud Email Security | <12.5.1-037 | |
| Cisco Email Security Appliance | <12.5.1-037 | |
| Cisco Cloud Email Security | <13.0.0-375 | |
| Cisco Email Security Appliance | <13.0.0-375 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3132?
CVE-2020-3132 is a vulnerability in the email message scanning feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) that could allow an unauthenticated, remote attacker to cause a temporary denial of service (DoS) condition on an affected device.
Which software versions are affected by CVE-2020-3132?
Cisco Cloud Email Security versions up to 12.5.1-037 and 13.0.0-375, as well as Cisco Email Security Appliance versions up to 12.5.1-037 and 13.0.0-375, are affected by CVE-2020-3132.
What is the severity of CVE-2020-3132?
CVE-2020-3132 has a severity score of 5.9, which is classified as high.
How can an attacker exploit CVE-2020-3132?
An attacker can exploit CVE-2020-3132 by sending a specially crafted email to the affected device, which can cause a temporary denial of service (DoS) condition.
Where can I find more information about CVE-2020-3132?
You can find more information about CVE-2020-3132 on the Cisco Security Advisory website at <a href='https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-shrt-dos-wM54R8qA'>https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-shrt-dos-wM54R8qA</a>.
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