CVE-2020-3533: Cisco Firepower Threat Defense Software SNMP Denial of Service Vulnerability
First published: Wed Oct 21 2020(Updated: )
A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to restart unexpectedly. The vulnerability is due to a lack of sufficient memory management protections under heavy SNMP polling loads. An attacker could exploit this vulnerability by sending a high rate of SNMP requests to the SNMP daemon through the management interface on an affected device. A successful exploit could allow the attacker to cause the SNMP daemon process to consume a large amount of system memory over time, which could then lead to an unexpected device restart, causing a denial of service (DoS) condition. This vulnerability affects all versions of SNMP.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | <6.3.0.6 | |
| Cisco Firepower Threat Defense | >=6.4.0<6.4.0.10 | |
| Cisco Firepower Threat Defense | >=6.5.0<6.5.0.5 | |
| Cisco Firepower Threat Defense | >=6.6.0<6.6.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3533?
CVE-2020-3533 is a vulnerability in the SNMP input packet processor of Cisco Firepower Threat Defense (FTD) Software.
How does CVE-2020-3533 affect Cisco Firepower Threat Defense?
CVE-2020-3533 can allow an unauthenticated, remote attacker to cause an affected device to restart unexpectedly.
What is the severity of CVE-2020-3533?
CVE-2020-3533 has a severity rating of 7.5, which is considered high.
Which version of Cisco Firepower Threat Defense is affected by CVE-2020-3533?
Cisco Firepower Threat Defense versions 6.3.0.6 to 6.6.1 are affected by CVE-2020-3533.
How can I fix CVE-2020-3533?
To fix CVE-2020-3533, it is recommended to upgrade Cisco Firepower Threat Defense to a version that is not affected by the vulnerability.
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