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CVE-2020-3196

HIGHCVSS 8.6/10EPSS 2.13%

Last modified

CVE-2020-3196 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust memory resources on the affected device, leading to a denial of service (DoS) condition. The vulnerability is due to improper resource management for inbound SSL/TLS connections. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

Description

A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust memory resources on the affected device, leading to a denial of service (DoS) condition. The vulnerability is due to improper resource management for inbound SSL/TLS connections. An attacker could exploit this vulnerability by establishing multiple SSL/TLS connections with specific conditions to the affected device. A successful exploit could allow the attacker to exhaust the memory on the affected device, causing the device to stop accepting new SSL/TLS connections and resulting in a DoS condition for services on the device that process SSL/TLS traffic. Manual intervention is required to recover an affected device.

Metrics

CVSS 3.1
8.6/10

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

CVSS 3.0
8.6/10

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

EPSS Probability
2.13%

80.2th 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
CiscoFirepower Threat Defense>= 6.5.0, < 6.5.0.5
CiscoAsa 5505 Firmware9.4\(4\)
CiscoAsa 5505 Firmware9.8\(4.18\)
CiscoAsa 5505 Firmware100.13\(0\)
CiscoAsa 5510 Firmware9.4\(4\)
CiscoAsa 5510 Firmware9.8\(4.18\)
CiscoAsa 5510 Firmware100.13\(0\)
CiscoAsa 5512-X Firmware9.4\(4\)
CiscoAsa 5512-X Firmware9.8\(4.18\)
CiscoAsa 5512-X Firmware100.13\(0\)
CiscoAsa 5515-X Firmware9.4\(4\)
CiscoAsa 5515-X Firmware9.8\(4.18\)
CiscoAsa 5515-X Firmware100.13\(0\)
CiscoAsa 5520 Firmware9.4\(4\)
CiscoAsa 5520 Firmware9.8\(4.18\)
CiscoAsa 5520 Firmware100.13\(0\)
CiscoAsa 5525-X Firmware9.4\(4\)
CiscoAsa 5525-X Firmware9.8\(4.18\)
CiscoAsa 5525-X Firmware100.13\(0\)
CiscoAsa 5540 Firmware9.4\(4\)
CiscoAsa 5540 Firmware9.8\(4.18\)
CiscoAsa 5540 Firmware100.13\(0\)
CiscoAsa 5545-X Firmware9.4\(4\)
CiscoAsa 5545-X Firmware9.8\(4.18\)
CiscoAsa 5545-X Firmware100.13\(0\)
CiscoAsa 5550 Firmware9.4\(4\)
CiscoAsa 5550 Firmware9.8\(4.18\)
CiscoAsa 5550 Firmware100.13\(0\)
CiscoAsa 5555-X Firmware9.4\(4\)
CiscoAsa 5555-X Firmware9.8\(4.18\)
CiscoAsa 5555-X Firmware100.13\(0\)
CiscoAsa 5580 Firmware9.4\(4\)
CiscoAsa 5580 Firmware9.8\(4.18\)
CiscoAsa 5580 Firmware100.13\(0\)
CiscoAsa 5585-X Firmware9.4\(4\)
CiscoAsa 5585-X Firmware9.8\(4.18\)
CiscoAsa 5585-X Firmware100.13\(0\)
CiscoAdaptive Security Appliance Software>= 9.6, < 9.6.4.40
CiscoAdaptive Security Appliance Software>= 9.8, < 9.8.4.20
CiscoAdaptive Security Appliance Software>= 9.9, < 9.9.2.66
CiscoAdaptive Security Appliance Software>= 9.10, < 9.10.1.37
CiscoAdaptive Security Appliance Software>= 9.12, < 9.12.3.2
CiscoAdaptive Security Appliance Software>= 9.13, < 9.13.1.7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3196?
A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust memory resources on the affected device, leading to a denial of service (DoS) condition. The vulnerability is due to improper resource management for inbound SSL/TLS connections. An attacker could exploit this vulnerability by establishing multiple SSL/TLS connections with specific conditions to the affected device. A successful exploit could allow the attacker to exhaust the memory on the affected device, causing the device to stop accepting new SSL/TLS connections and resulting in a DoS condition for services on the device that process SSL/TLS traffic. Manual intervention is required to recover an affected device.
How severe is CVE-2020-3196?
CVE-2020-3196 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3196?
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