high
7.5
CWE
400
Advisory Published
Updated

CVE-2020-3255: Cisco Firepower Threat Defense Software Packet Flood Denial of Service Vulnerability

First published: Wed May 06 2020(Updated: )

A vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a high rate of IPv4 or IPv6 traffic through an affected device. This traffic would need to match a configured block action in an access control policy. An exploit could allow the attacker to cause a memory exhaustion condition on the affected device, which would result in a DoS for traffic transiting the device, as well as sluggish performance of the management interface. Once the flood is stopped, performance should return to previous states.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Firepower Threat Defense>=6.2.3<6.2.3.16
Cisco Firepower Threat Defense>=6.3.0<6.3.0.6
Cisco Firepower Threat Defense>=6.4.0<6.4.0.9
Cisco Asa 5505 Firmware=9.10\(1.3\)
Cisco Asa 5505
Cisco Asa 5510 Firmware=9.10\(1.3\)
Cisco Asa 5510
Cisco Asa 5512-x Firmware=9.10\(1.3\)
Cisco Asa 5512-x
Cisco Asa 5515-x Firmware=9.10\(1.3\)
Cisco Asa 5515-x
Cisco Asa 5520 Firmware=9.10\(1.3\)
Cisco Asa 5520
Cisco Asa 5525-x Firmware=9.10\(1.3\)
Cisco Asa 5525-x
Cisco Asa 5540 Firmware=9.10\(1.3\)
Cisco Asa 5540
Cisco Asa 5545-x Firmware=9.10\(1.3\)
Cisco Asa 5545-x
Cisco Asa 5550 Firmware=9.10\(1.3\)
Cisco Asa 5550
Cisco Asa 5555-x Firmware=9.10\(1.3\)
Cisco Asa 5555-x
Cisco Asa 5580 Firmware=9.10\(1.3\)
Cisco Asa 5580
Cisco Asa 5585-x Firmware=9.10\(1.3\)
Cisco Asa 5585-x

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Reference Links

Frequently Asked Questions

  • What is the vulnerability ID of this Cisco Firepower Threat Defense (FTD) Software vulnerability?

    The vulnerability ID of this Cisco Firepower Threat Defense (FTD) Software vulnerability is CVE-2020-3255.

  • What is the severity of CVE-2020-3255?

    The severity of CVE-2020-3255 is high.

  • How does CVE-2020-3255 affect Cisco Firepower Threat Defense Software?

    CVE-2020-3255 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device running Cisco Firepower Threat Defense Software.

  • Which versions of Cisco Firepower Threat Defense Software are affected by CVE-2020-3255?

    Versions 6.2.3 to 6.2.3.16, 6.3.0 to 6.3.0.6, and 6.4.0 to 6.4.0.9 of Cisco Firepower Threat Defense Software are affected by CVE-2020-3255.

  • How can I fix CVE-2020-3255?

    To fix CVE-2020-3255, Cisco recommends upgrading to a fixed software release.

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