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CVE-2020-3255

HIGHCVSS 7.5/10EPSS 1.80%

Last modified

CVE-2020-3255 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 3.0
7.5/10

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.80%

76.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense>= 6.2.3, < 6.2.3.16
CiscoFirepower Threat Defense>= 6.3.0, < 6.3.0.6
CiscoFirepower Threat Defense>= 6.4.0, < 6.4.0.9
CiscoAsa 5505 Firmware9.10\(1.3\)
CiscoAsa 5510 Firmware9.10\(1.3\)
CiscoAsa 5512-X Firmware9.10\(1.3\)
CiscoAsa 5515-X Firmware9.10\(1.3\)
CiscoAsa 5520 Firmware9.10\(1.3\)
CiscoAsa 5525-X Firmware9.10\(1.3\)
CiscoAsa 5540 Firmware9.10\(1.3\)
CiscoAsa 5545-X Firmware9.10\(1.3\)
CiscoAsa 5550 Firmware9.10\(1.3\)
CiscoAsa 5555-X Firmware9.10\(1.3\)
CiscoAsa 5580 Firmware9.10\(1.3\)
CiscoAsa 5585-X Firmware9.10\(1.3\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3255?
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.
How severe is CVE-2020-3255?
CVE-2020-3255 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3255?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST