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CVE-2020-3179

HIGHCVSS 7.5/10EPSS 1.93%

Last modified

CVE-2020-3179 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature 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 a memory handling error when GRE over IPv6 traffic is processed. EPSS estimates a 1.93% chance of exploitation in the next 30 days.

Description

A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature 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 a memory handling error when GRE over IPv6 traffic is processed. An attacker could exploit this vulnerability by sending crafted GRE over IPv6 packets with either IPv4 or IPv6 payload through an affected device. A successful exploit could allow the attacker to cause the device to crash, resulting in a DoS condition.

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

EPSS Probability
1.93%

77.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense>= 6.3.0, < 6.3.0.5
CiscoFirepower Threat Defense>= 6.4.0, < 6.4.0.6
CiscoAsa 5505 Firmware9.9\(2\)
CiscoAsa 5505 Firmware101.5\(1.26\)
CiscoAsa 5510 Firmware9.9\(2\)
CiscoAsa 5510 Firmware101.5\(1.26\)
CiscoAsa 5512-X Firmware9.9\(2\)
CiscoAsa 5512-X Firmware101.5\(1.26\)
CiscoAsa 5515-X Firmware9.9\(2\)
CiscoAsa 5515-X Firmware101.5\(1.26\)
CiscoAsa 5520 Firmware9.9\(2\)
CiscoAsa 5520 Firmware101.5\(1.26\)
CiscoAsa 5525-X Firmware9.9\(2\)
CiscoAsa 5525-X Firmware101.5\(1.26\)
CiscoAsa 5540 Firmware9.9\(2\)
CiscoAsa 5540 Firmware101.5\(1.26\)
CiscoAsa 5545-X Firmware9.9\(2\)
CiscoAsa 5545-X Firmware101.5\(1.26\)
CiscoAsa 5550 Firmware9.9\(2\)
CiscoAsa 5550 Firmware101.5\(1.26\)
CiscoAsa 5555-X Firmware9.9\(2\)
CiscoAsa 5555-X Firmware101.5\(1.26\)
CiscoAsa 5580 Firmware9.9\(2\)
CiscoAsa 5580 Firmware101.5\(1.26\)
CiscoAsa 5585-X Firmware9.9\(2\)
CiscoAsa 5585-X Firmware101.5\(1.26\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3179?
A vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature 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 a memory handling error when GRE over IPv6 traffic is processed. An attacker could exploit this vulnerability by sending crafted GRE over IPv6 packets with either IPv4 or IPv6 payload through an affected device. A successful exploit could allow the attacker to cause the device to crash, resulting in a DoS condition.
How severe is CVE-2020-3179?
CVE-2020-3179 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.93% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3179?
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.

Are you affected by CVE-2020-3179?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST