CVE-2024-20330: Cisco Firepower Threat Defense Software for Cisco Firepower 2100 Series TCP UDP Snort 2 and Snort 2 Denial of Service Vulnerability
First published: Wed Oct 23 2024(Updated: )
A vulnerability in the Snort 2 and Snort 3 TCP and UDP detection engine of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Appliances could allow an unauthenticated, remote attacker to cause memory corruption, which could cause the Snort detection engine to restart unexpectedly. This vulnerability is due to improper memory management when the Snort detection engine processes specific TCP or UDP packets. An attacker could exploit this vulnerability by sending crafted TCP or UDP packets through a device that is inspecting traffic using the Snort detection engine. A successful exploit could allow the attacker to restart the Snort detection engine repeatedly, which could cause a denial of service (DoS) condition. The DoS condition impacts only the traffic through the device that is examined by the Snort detection engine. The device can still be managed over the network. Note: Once a memory block is corrupted, it cannot be cleared until the Cisco Firepower 2100 Series Appliance is manually reloaded. This means that the Snort detection engine could crash repeatedly, causing traffic that is processed by the Snort detection engine to be dropped until the device is manually reloaded.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Secure Firewall Threat Defense |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-20330?
CVE-2024-20330 has been classified as a critical vulnerability due to its potential to allow unauthenticated remote exploitation.
How do I fix CVE-2024-20330?
To fix CVE-2024-20330, you should upgrade your Cisco Firepower Threat Defense software to the latest patched version provided by Cisco.
What types of devices are affected by CVE-2024-20330?
CVE-2024-20330 affects the Cisco Firepower 2100 Series Appliances running the Snort 2 and Snort 3 detection engines.
What impact can CVE-2024-20330 have on my network?
Exploitation of CVE-2024-20330 could lead to memory corruption in the Snort detection engine, potentially causing disruptions in network protection.
Is CVE-2024-20330 being actively exploited in the wild?
As of the latest reports, there is no confirmation of active exploitation of CVE-2024-20330, but its critical nature warrants immediate attention.
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