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CVE-2020-3283

HIGHCVSS 8.6/10EPSS 1.96%

Last modified

CVE-2020-3283 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 Firepower Threat Defense (FTD) Software when running on the Cisco Firepower 1000 Series platform could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a communication error between internal functions. EPSS estimates a 1.96% chance of exploitation in the next 30 days.

Description

A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Firepower Threat Defense (FTD) Software when running on the Cisco Firepower 1000 Series platform could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a communication error between internal functions. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause a buffer underrun, which leads to a crash. The crash causes the affected device to reload.

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
1.96%

78.4th 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
CiscoAsa 5505 Firmware9.12\(2.12\)
CiscoAsa 5505 Firmware9.13\(0.33\)
CiscoAsa 5510 Firmware9.12\(2.12\)
CiscoAsa 5510 Firmware9.13\(0.33\)
CiscoAsa 5512-X Firmware9.12\(2.12\)
CiscoAsa 5512-X Firmware9.13\(0.33\)
CiscoAsa 5515-X Firmware9.12\(2.12\)
CiscoAsa 5515-X Firmware9.13\(0.33\)
CiscoAsa 5520 Firmware9.12\(2.12\)
CiscoAsa 5520 Firmware9.13\(0.33\)
CiscoAsa 5525-X Firmware9.12\(2.12\)
CiscoAsa 5525-X Firmware9.13\(0.33\)
CiscoAsa 5540 Firmware9.12\(2.12\)
CiscoAsa 5540 Firmware9.13\(0.33\)
CiscoAsa 5545-X Firmware9.12\(2.12\)
CiscoAsa 5545-X Firmware9.13\(0.33\)
CiscoAsa 5550 Firmware9.12\(2.12\)
CiscoAsa 5550 Firmware9.13\(0.33\)
CiscoAsa 5555-X Firmware9.12\(2.12\)
CiscoAsa 5555-X Firmware9.13\(0.33\)
CiscoAsa 5580 Firmware9.12\(2.12\)
CiscoAsa 5580 Firmware9.13\(0.33\)
CiscoAsa 5585-X Firmware9.12\(2.12\)
CiscoAsa 5585-X Firmware9.13\(0.33\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3283?
A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Firepower Threat Defense (FTD) Software when running on the Cisco Firepower 1000 Series platform could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. The vulnerability is due to a communication error between internal functions. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message to an affected device. A successful exploit could allow the attacker to cause a buffer underrun, which leads to a crash. The crash causes the affected device to reload.
How severe is CVE-2020-3283?
CVE-2020-3283 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.96% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3283?
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