8.6
CWE
20 400
Advisory Published
Updated

CVE-2020-3571: Cisco Firepower 4110 ICMP Flood Denial of Service Vulnerability

First published: Wed Oct 21 2020(Updated: )

A vulnerability in the ICMP ingress packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 4110 appliances could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incomplete input validation upon receiving ICMP packets. An attacker could exploit this vulnerability by sending a high number of crafted ICMP or ICMPv6 packets to an affected device. A successful exploit could allow the attacker to cause a memory exhaustion condition that may result in an unexpected reload. No manual intervention is needed to recover the device after the reload.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Firepower Threat Defense>=6.3.0<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 4110
Cisco Firepower 4112
Cisco Firepower 4115
Cisco Firepower 4120
Cisco Firepower 4125
Cisco Firepower 4140
Cisco Firepower 4145
Cisco Firepower 4150

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Frequently Asked Questions

  • What is CVE-2020-3571?

    CVE-2020-3571 is a vulnerability in the ICMP ingress packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 4110 appliances.

  • How does CVE-2020-3571 affect Cisco Firepower Threat Defense?

    CVE-2020-3571 allows an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

  • What is the severity of CVE-2020-3571?

    CVE-2020-3571 has a severity value of 8.6, which is considered high.

  • Which versions of Cisco Firepower Threat Defense are affected by CVE-2020-3571?

    CVE-2020-3571 affects Cisco Firepower Threat Defense versions 6.3.0 through 6.5.0.

  • How can I fix CVE-2020-3571?

    To fix CVE-2020-3571, it is recommended to upgrade to a version of Cisco Firepower Threat Defense that is not affected by the vulnerability.

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