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CVE-2020-3188

MEDIUMCVSS 5.3/10EPSS 1.68%

Last modified

CVE-2020-3188 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A vulnerability in how Cisco Firepower Threat Defense (FTD) Software handles session timeouts for management connections could allow an unauthenticated, remote attacker to cause a buildup of remote management connections to an affected device, which could result in a denial of service (DoS) condition. The vulnerability exists because the default session timeout period for specific to-the-box remote management connections is too long. EPSS estimates a 1.68% chance of exploitation in the next 30 days.

Description

A vulnerability in how Cisco Firepower Threat Defense (FTD) Software handles session timeouts for management connections could allow an unauthenticated, remote attacker to cause a buildup of remote management connections to an affected device, which could result in a denial of service (DoS) condition. The vulnerability exists because the default session timeout period for specific to-the-box remote management connections is too long. An attacker could exploit this vulnerability by sending a large and sustained number of crafted remote management connections to an affected device, resulting in a buildup of those connections over time. A successful exploit could allow the attacker to cause the remote management interface or Cisco Firepower Device Manager (FDM) to stop responding and cause other management functions to go offline, resulting in a DoS condition. The user traffic that is flowing through the device would not be affected, and the DoS condition would be isolated to remote management only.

Metrics

CVSS 3.1
5.3/10

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

CVSS 3.0
5.3/10

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

EPSS Probability
1.68%

74.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense>= 6.4.0, < 6.4.0.9
CiscoFirepower Threat Defense>= 6.5.0, < 6.5.0.5
CiscoAsa 5505 Firmware9.8\(3\)
CiscoAsa 5505 Firmware101.6\(1.96\)
CiscoAsa 5510 Firmware9.8\(3\)
CiscoAsa 5510 Firmware101.6\(1.96\)
CiscoAsa 5512-X Firmware9.8\(3\)
CiscoAsa 5512-X Firmware101.6\(1.96\)
CiscoAsa 5515-X Firmware9.8\(3\)
CiscoAsa 5515-X Firmware101.6\(1.96\)
CiscoAsa 5520 Firmware9.8\(3\)
CiscoAsa 5520 Firmware101.6\(1.96\)
CiscoAsa 5525-X Firmware9.8\(3\)
CiscoAsa 5525-X Firmware101.6\(1.96\)
CiscoAsa 5540 Firmware9.8\(3\)
CiscoAsa 5540 Firmware101.6\(1.96\)
CiscoAsa 5545-X Firmware9.8\(3\)
CiscoAsa 5545-X Firmware101.6\(1.96\)
CiscoAsa 5550 Firmware9.8\(3\)
CiscoAsa 5550 Firmware101.6\(1.96\)
CiscoAsa 5555-X Firmware9.8\(3\)
CiscoAsa 5555-X Firmware101.6\(1.96\)
CiscoAsa 5580 Firmware9.8\(3\)
CiscoAsa 5580 Firmware101.6\(1.96\)
CiscoAsa 5585-X Firmware9.8\(3\)
CiscoAsa 5585-X Firmware101.6\(1.96\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3188?
A vulnerability in how Cisco Firepower Threat Defense (FTD) Software handles session timeouts for management connections could allow an unauthenticated, remote attacker to cause a buildup of remote management connections to an affected device, which could result in a denial of service (DoS) condition. The vulnerability exists because the default session timeout period for specific to-the-box remote management connections is too long. An attacker could exploit this vulnerability by sending a large and sustained number of crafted remote management connections to an affected device, resulting in a buildup of those connections over time. A successful exploit could allow the attacker to cause the remote management interface or Cisco Firepower Device Manager (FDM) to stop responding and cause other management functions to go offline, resulting in a DoS condition. The user traffic that is flowing through the device would not be affected, and the DoS condition would be isolated to remote management only.
How severe is CVE-2020-3188?
CVE-2020-3188 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3188?
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.

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Source: NVD / NIST